Avatars and Profile Pictures - Making them the same

[SwalyAaron]

I know this is possible, I've did it before but I honestly forgot (I think I used a hook) anyways, do any of you guys know how to make them the same? (Just need the avatars to show above the username in user profile page

Also how can I get avatars to change automatically as posts increase, not a new avatar to be chosen one that is locked at a certain post count and can't be changed back.