It do support all levels from 1 to 100. If you have errors, please make proper report for it.
Not really

That is, it won' t work at all for a druid using the instant boost to lvl 90 because they have a very basic set of spells. (You get a free lvl 90 boost when Warlords of Drainer is bought).
This basic set is extended to the full set when you enter Draenor itself.
[10:18:45.466 N] [KittyDru 45.466]: !Failed! (SPELL_FAILED_NOT_KNOWN) Mark of the Wild (0 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:0 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:18:45.466 D] [QDBG] Done with forced behavior Bots.Quest.QuestOrder.ForcedWhile.
[10:18:45.466 D] [QDBG] Starting behavior Bots.Quest.QuestOrder.ForcedWhile.
[10:18:45.701 N] [KittyDru 45.701]: !Failed! (SPELL_FAILED_NOT_KNOWN) Mark of the Wild (0 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:0 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:18:45.701 D] [QDBG] Done with forced behavior Bots.Quest.QuestOrder.ForcedWhile.
[10:18:45.701 D] [QDBG] Starting behavior Bots.Quest.QuestOrder.ForcedWhile.
[10:18:45.919 N] [KittyDru 45.919]: !Failed! (SPELL_FAILED_NOT_KNOWN) Mark of the Wild (0 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:0 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:18:45.919 D] [QDBG] Done with forced behavior Bots.Quest.QuestOrder.ForcedWhile.
[10:18:45.919 D] [QDBG] Starting behavior Bots.Quest.QuestOrder.ForcedWhile.
[10:18:46.247 N] [KittyDru 46.247]: !Failed! (SPELL_FAILED_NOT_KNOWN) Mark of the Wild (0 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:0 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:18:46.607 N] [KittyDru 46.607]: Cat Form (0 - 100) on Me [Remaining HP:43022/100%] CP:0 E:30->0 sec D:0 TT:3[1.5+1.5]
[10:18:46.685 D] Changed POI to: Type: Kill, Name: Warsong Commander
[10:18:48.904 N] [KittyDru 48.904]: Starting Single Rotation, units in 8 meters : 1
[10:18:48.919 N] [KittyDru 48.919]: Changing target to Iron Grunt@1406
[10:18:48.919 N] [KittyDru 48.919]: Targeting Target: Iron Grunt@1406
[10:18:49.294 N] [KittyDru 49.294]: Rake@1 (35 - 100) on Iron Grunt@1406 [Remaining HP:15902/90.85%] CP:0 E:11->0 sec D:5.05 TT:4.03[2.53+1.5]
[10:18:50.185 N] [KittyDru 50.185]: !Failed! (SPELL_FAILED_NOT_KNOWN) Savage Roar (25 - 75) on Me [SPELL_FAILED_NOT_KNOWN] CP:1 E:11->2.26 sec D:0 TT:3[1.5+1.5]
[10:18:51.529 N] [KittyDru 51.529]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 89) on Iron Grunt@1406 [SPELL_FAILED_NOT_KNOWN] CP:1 E:11->0.99 sec D:15.39 TT:4.03[2.53+1.5]
[10:18:51.841 N] [KittyDru 51.841]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 92) on Iron Grunt@1406 [SPELL_FAILED_NOT_KNOWN] CP:1 E:11->0.72 sec D:18.15 TT:4.03[2.53+1.5]
[10:18:52.138 N] [KittyDru 52.138]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 96) on Iron Grunt@1406 [SPELL_FAILED_NOT_KNOWN] CP:1 E:11->0.36 sec D:17.18 TT:4.03[2.53+1.5]
[10:18:53.185 N] [KittyDru 53.185]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@1406 [SPELL_FAILED_NOT_KNOWN] CP:1 E:11->0 sec D:15.05 TT:4.03[2.53+1.5]
[10:18:53.200 N] [KittyDru 53.200]: Changing target to Iron Grunt@8CA6
[10:18:53.200 N] [KittyDru 53.200]: Targeting Target: Iron Grunt@8CA6
[10:18:53.451 N] [KittyDru 53.451]: Rake@1 (35 - 100) on Iron Grunt@8CA6 [Remaining HP:14466/82.65%] CP:1 E:11->0 sec D:2.88 TT:3.53[2.03+1.5]
[10:18:54.482 N] [KittyDru 54.482]: !Failed! (SPELL_FAILED_NOT_KNOWN) Savage Roar (25 - 74) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->2.35 sec D:0 TT:3[1.5+1.5]
[10:18:54.810 N] [KittyDru 54.810]: !Failed! (SPELL_FAILED_NOT_KNOWN) Savage Roar (25 - 77) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->2.08 sec D:0 TT:3[1.5+1.5]
[10:18:55.966 N] [KittyDru 55.966]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 92) on Iron Grunt@8CA6 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0.72 sec D:15.04 TT:4.03[2.53+1.5]
[10:18:57.060 N] [KittyDru 57.060]: !Failed! (NONE) Dash (0 - 94) on Iron Grunt@8CA6 [NONE] CP:2 E:11->0.54 sec D:17.42 TT:4.03[2.53+1.5]
[10:18:57.372 N] [KittyDru 57.372]: !Failed! (SPELL_FAILED_NOT_KNOWN) Travel Form (0 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:18:57.575 N] [KittyDru 57.575]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@8CA6 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:30.29 TT:4.03[2.53+1.5]
[10:18:57.919 N] [KittyDru 57.919]: Cat Form (0 - 100) on Me [Remaining HP:41622/96.75%] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:18:59.232 N] [KittyDru 59.232]: Not SIGHN@Dash Iron Grunt@8CA6
[10:18:59.872 N] [KittyDru 59.872]: Changing target to Iron Grunt@B9C8
[10:18:59.872 N] [KittyDru 59.872]: Targeting Target: Iron Grunt@B9C8
[10:19:00.200 N] [KittyDru 00.200]: !Failed! (SPELL_FAILED_NOT_KNOWN) Savage Roar (25 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:00.513 N] [KittyDru 00.513]: !Failed! (SPELL_FAILED_NOT_KNOWN) Savage Roar (25 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:00.747 N] [KittyDru 00.747]: !Failed! (SPELL_FAILED_NOT_KNOWN) Savage Roar (25 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:01.888 N] [KittyDru 01.888]: !Failed! (NONE) Savage Roar (25 - 100) on Me [NONE] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:01.966 D] Clearing POI - Reason POI is evade running back.
[10:19:02.044 D] Changed POI to: Type: Kill, Name: Iron Grunt
[10:19:03.606 N] [KittyDru 03.606]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:15.29 TT:4.03[2.53+1.5]
[10:19:04.794 N] [KittyDru 04.794]: !Failed! (NONE) Dash (0 - 100) on Iron Grunt@B9C8 [NONE] CP:2 E:11->0 sec D:18.62 TT:4.03[2.53+1.5]
[10:19:05.153 N] [KittyDru 05.153]: !Failed! (SPELL_FAILED_NOT_KNOWN) Travel Form (0 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:05.356 N] [KittyDru 05.356]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:32 TT:4.03[2.53+1.5]
[10:19:05.560 N] [KittyDru 05.560]: Cat Form (0 - 100) on Me [Remaining HP:41119/95.58%] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:07.138 N] [KittyDru 07.138]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:47.18 TT:3.53[2.03+1.5]
[10:19:07.200 N] [KittyDru 07.200]: Moving from <4065.346, -2374.584, 94.60199> to <4041.634, -2418.363, 94.60497>
[10:19:07.200 D] Skipped 4 path nodes
[10:19:07.528 N] [KittyDru 07.528]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:50.06 TT:3.53[2.03+1.5]
[10:19:07.528 D] Generating new path because we are not on the old path anymore!
[10:19:07.528 D] Skipped 3 path nodes
[10:19:07.747 N] [KittyDru 07.747]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:47.93 TT:3.53[2.03+1.5]
[10:19:08.060 N] [KittyDru 08.060]: Deleting died enemy: Iron Grunt@140A from targets list
[10:19:08.075 N] [KittyDru 08.075]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:47.6 TT:3.53[2.03+1.5]
[10:19:08.372 N] [KittyDru 08.372]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:44.86 TT:3.53[2.03+1.5]
[10:19:08.606 N] [KittyDru 08.606]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:41.87 TT:3.53[2.03+1.5]
[10:19:08.716 N] [KittyDru 08.716]: Not SIGHN@Dash Iron Grunt@B9C8
[10:19:09.748 V] We are stuck! (TPS: 12.64705, FPS: 24, Map: TanaanJungleIntro, loc: <4059.418, -2381.491, 94.83792>)!
[10:19:09.763 D] Nearest game object, distance 11.29 yards
<!--Collision PC Size in Tanaan Jungle zone and on TanaanJungleIntro continent-->
<GameObject model="World\GENERIC\Collision\Collision_PCSize.M2">
<Matrix M11="1" M12="0" M13="0" M14="0" M21="0" M22="1" M23="0" M24="0" M31="0" M32="0" M33="1" M34="0" M41="4066.33252" M42="-2372.57129" M43="94.5997849" M44="1" />
</GameObject>
[10:19:09.763 V] Trying jump
[10:19:10.372 N] [KittyDru 10.372]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:43 TT:3.53[2.03+1.5]
[10:19:10.622 N] [KittyDru 10.622]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:44.81 TT:3.53[2.03+1.5]
[10:19:10.950 N] [KittyDru 10.950]: !Failed! (SPELL_FAILED_NOT_KNOWN) Travel Form (0 - 100) on Me [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:11.137 N] [KittyDru 11.137]: !Failed! (SPELL_FAILED_NOT_KNOWN) Dash (0 - 100) on Iron Grunt@B9C8 [SPELL_FAILED_NOT_KNOWN] CP:2 E:11->0 sec D:45.83 TT:3.53[2.03+1.5]
[10:19:11.137 D] Generating new path because we are not on the old path anymore!
[10:19:11.387 N] [KittyDru 11.387]: Cat Form (0 - 100) on Me [Remaining HP:41119/95.58%] CP:2 E:11->0 sec D:0 TT:3[1.5+1.5]
[10:19:12.200 V] We are stuck! (TPS: 11.15183, FPS: 24, Map: TanaanJungleIntro, loc: <4064.319, -2385.31, 94.78952>)!
[10:19:12.216 D] Nearest game object, distance 12.90 yards
<!--Collision PC Size in Tanaan Jungle zone and on TanaanJungleIntro continent-->