This is a copy of a post I posted in answer to you in the Firmware thread. Just thought I’d repost it here in case you didn’t see it there.
Yeah, I’ve noticed this too. I build MOJO over PsychoTCHs Anodized theme, and it gives me an option to Upgrade, even though there’s no upgrade available. And if you press Upgrade it will try to overwrite my theme with the Anodized theme.
I don’t know if this is a case of it caching something when you install a theme and you make a new theme with that theme and the meta info doesn’t get overwritten or it’s something that I missing, although as of now I can’t see what it might it would be. I also don’t know if this is just a side effect of making a theme on your own machine, it may not be an issue when others install your theme.
Anyway, I would suggest to always backup your themes to your PC and if you need to download the Legacy theme, although I would suggest downloading the Mochi (OSD) theme (you can find a link to the latest in the Themes Forum), because the Legacy theme doesn’t contain all the icons and info that the OSD does, to your PC, then copy what you need to your theme.