PrestonPark avatar image

Having trouble changing my Avatar

I managed to delete my old picture and upload a new one. However, when I saw how awful it looked compressed, I decided to upload a third picture. Now, even though I've deleted the second picture, it keeps coming back whenever I upload a new pic (I would browse and find it on my drive, then upload it...but I would then see the second pic instead of the new one)! Help!