I also ran into that problem yesterday. I had tried putting a certain skin on someone's xbox (blackbolt_consolev3) and for some reason when I selected that one, it only showed the original EvoX skin. I didn't really think much of it.
but...
I use the same skin on my own xbox, and today I decided to ftp over a few more (just to try them out), and while I was at it, I decided to try FTPing the working blackbolt_consolev3 skin from my xbox (where it worked just fine before), over to my computer so that I could load it onto other people's machines. I thought that maybe the copy I originally had on my PC (that I loaded onto the person above's xbox) had something wrong with it. So I figured that I'd FTP over the working one from my xbox.
Anyways, after doing this, for some strange reason I can't get that skin to work on my xbox either! Strangest thing. Whenever I select it, it only shows the original EvoX skin. I've even tried re-FTPing it back onto the xbox, but this hasn't worked either. I was going to search the forums here, and I stumbled across this thread right away (which seems to be indentical to my problem).
If anyone knows what the heck could be causing this, please let us know as this is annoying the hell outta me. I'm sure it's just something real simple that we've overlooked. Weird though...
Thanks