I'm making my own blank starter WordPress theme & it currently shows many times in the admin theme page & I do not know why! Does anyone know why this might be (& how to fix it)?
UPDATE 280413 (NB please see my comment below) So after the disaster of my localhost wordpress crash after I tried deleting one of these themes at themes dashboard I reinstalled most of the themes that had been lost. Today while working on a theme I noticed it's link color style remained after I had changed it and saw firebug was pointing to a style.css file OUTSIDE of the localhost/wordpress directory. This style.css was a copy of the style.css in the localhost/wordpress/wp-content/themes/xxxtheme folder I had been editing. I removed the whole folder/directory that was outside wordpress with that style.css from my localhost directory (ie inetpub/wwwroot/xxxtheme folder) & my WordPress theme xxxtheme style editing worked.
I had not realised that folders outside my wordpress folder in my IIS localhost server (yet still in my localhost IIS default site structure) could interact in this way with the wordpress style.css in themes directory. I strongly suspect that this has something to do with the problem I had with so many of the same themes showing in the theme admin dashboard.
I have 'cleansed' my localhost default and localhost wordpress directory of duplicate theme folders & similar wordpress theme style sheets and truly hope this has fixed this problem. Knowing this also will help me do css styling in localhost/localhost/wordpress with less chance of css conflicts/unwanted inheritances....phew! :-)
The screenshot below shows firebug style.css popup referring to a different location to the main style.css for the wp xxxtheme.