ok, from what i can tell.. profile picture and avatar are two different things.
your avatar shows along with your post whereas your profile picture will show when someone looks at your profile.
from what i can see, you don't have an avatar anymore and if you want one, you need to re-upload or select a photo. you should be able to have a sig photo, avatar and profile photo. all need to be 300x300 or smaller and 100kb or smaller.
