I just had something bizarre happen.
I was in the menu, selected deploy, recognized that I did this out of habit, but I had intended to upload a new copy of my image.
I selected go back, then upload, existing, and selected the image I was updating.
It then proceeded to deploy the image.
Has anyone else seen this? I'm 100% positive this is what happened, as the New or Existing selection is not present on the deploy menu.