theme switcher

my theme switcher all of a sudden started to be lame. i think it is because i tried out the themed login plugin. i have since then uninstalled it but my theme switcher is still messing up. i have tried another theme switcher and it is the same way…. basically when i click on a new theme, it does not switch at all. when i delete a theme from my themes directory, it doesnt update the fact that it has been deleted like it should.

any ideas?

link is https://blog.billybag.org