Thanks rrrix, it seems DB300 is not working correctly if bots are in a group. Nesox was already able to replicate the error and he is working on a fix.
Look here: http://www.thebuddyforum.com/demonbuddy-forum/demonbuddy-support/106725-bug-db-300-devs-please-fix-asap-2.html#post1044404
Btw. how...