Html On Page Totally Broken

I have made some changes to an HTML page where there is a lot going on, and I think I put something out of place, and now it is totally strange :) This page: http://www.problemio.c

Solution 1:

You have 101 Validation Errors.

Many won't cause your problem but there are a few that mention stray tags, etc. which can cause very serious negative effects to your layout.

Line 678, Column 19: end tag for element "p" which is not open

Line 510, Column 7: end tag for "head" which is not finished

Line 579, Column 15: end tag for "ul" which is not finished

Line 1023, Column 7: end tag for "div" omitted, but OMITTAG NO was specified