Kudose, thanks for taking a look, can I ask what browser you're using. Also are you using the enter key instead of pressing the button with the cursor, because that seems to cause problems but I don't think there is a good way of remedying the problem without restructuring the site. One reason I wanted to have it all contained in one php file is that it seemed to be easier to password protect.
Also from the edit menu, clicking "upper level" should take you back to the top. Tell me if it still doesn't work there, weird that it works great here. Although I get the headers warning, but I don't think that's a problem, it has to do with session_destroy, I'll look into it eventually but because it works it's on the bottom of the list.