Turns out all P40E american skins were Bob's Robin. Deleted all 15 res files and rerunning auto download.
When you have old skin.res files from before a graphics update, they remain even after that plane is remodeled. You will only see their names in the offline skins list. Only the new correct-shape skins show up in the servers. When you choose any of them they should default to the "default" skin because they cannot be displayed. In this case, "Bob's Robin" is the default P-40E skin we have.
So you just had old skin files filling your offline skins list, that's all.
Skuzzy: You missed one B-29 duplicate. It's not the same unit with different planes, but rather looks like the skin was updated and instead of replacing itself added a second.
The first with this name is: b29_4
The second with this name is b29_10
Note that the plane codes and nose art are the same except the noseart is in a different color. This is why I suspect it was a resubmission rather than a new addition.
The solution would be take 10 and put it in the 4 slot to update that one.