alignment problems

hi all,

i’m working on the site http://www.photocs.net and i’m having some alignment problems after having changed some code and not knowing what i did. things are supposed to look like this: http://www.photocs.net/temp/Untitled-1.jpg

i don’t have any education in site building and i built this one myself so the code is a bit messy. i’m afraid there might be some extra </div> tags laying around and that may cause the problem. could someone please help me out?

thank you!