Game Mechanics: Possible bug - pet haste/enchanter haste

[Halladar]

Last night I was grouped with an enchanter and mage in oasis. (this is a low level group, enchanter just got haste at 16, and mage wasn't much higher).

Talking with the mage he said his pet showed both burnout and enchanter haste on simultaneously.

1) I didn't see it of course.

2) I just didn't think it was supposed to work that way, I thought they took the same buff slot. But maybe it is supposed to work that way.