I know this feeling, tony ;-) The ban party started about a week ago and i was looking to ban reports threads with smirk like "they did something wrong" and then ...
I have few assumptions (can't share, sorry) but the scarriest is that they're doing shoot in for big wave (have some WoW botting expirience).
I'm 99% sure that this is server-side detection and not related to any part of exilebuddy. Will do some testing now
You could even say 99.9% for the server-side detection, they don't have the same staff as bli$$ does for manual investigations and shit, so they have some algorithms.
If it was a pre-wave attempt trust me, it wouldve been way more noticeable. 15 days until xpac, if it's the time for a wave, it's now. Why? people are probably piling/rmting currencies before the merge.
So no, it's not part of a pre-wave. Random bans related to behaviors, bad luck, ip spoofing... Some people wonder why they get banned after 10 hours of straight dried lake farming. Kappa
I also have a huge experience in botting, had a farm of like 15-20 wow accounts, cashed enough to pop on D3 where RMAH gave me some good days

then I slowd down, IRL had me
And trust me, WoW waves are way more horrid than PoE waves.
If you do things right, you don't have to be worried.