Ryu Round Gravatar Header Photo

I read through the previous forums and found several threads discussing this issue. However, I’ve attempted to follow the instructions and cannot restore the round gravatar header image.

I thought I could insert another photo behind the Gravatar image. But after inserting the photo as a header the Gravatar image disappeared and an ugly square version of the new image appeared in its place. So instead I attempted to simply reinstate my gravatar profile photo, but I cannot figure out how to restore it.

The blog in question is: caffeineandcommitment.wordpress.com