I just "got" this achievement. Given it is March, it does not seem right. Looking at my achievements, I don't actually seem to have it, though. Actually this isn't the first time something happened, mutliple times when I entered my wardrobe I came out getting the "Have 100 items in your wardrobe" achievement when I really don't, and am I supposed to be getting achievements for completing quests like every other day? Unfortunately I can't seem to reproduce any of them at will though.

Locking this up since it's a ticket issue. :)