Correct me if im wrong but what it apears im seeing there is the debuff from the Class being shown there and not necessarily just your own.
Ive thought on this before a bit and actualy think this could be a GOOD thing.
The trick is this is where that ugly green/red buff/debuff differentiator (no offense scott
) that was on the old aura bars would come in handy.
For example, often times in a raid when i am on my boomkin i want to make sure i keep faerie fire up on the mob at all times but there are several other druids in the raid doing the same thing. If they apply the debuff it will overwrite my own and to make sure it is still on my target i have to scan the mobs 40 debuffs to make sure it is still there. Now if your own Class specific applied debuffs could be displayed in the huds target debuff section, only colored to indicate when it wasnt my own, that would be REALLY REALLY useful.
Just a thought.