Weird Stuff Going On

Hey everyone, I have a quick question for you all…I am having trouble with CSS formating when I give my pages to my system administrator and he uploads them. Before I send them off, I check the sites on my test server in IE, Firefox, and Safari, but when he puts them up, the css gets all messed up when I view them in anything BUT IE. I think he may use MS Frontpage, but I’m not sure. Can you guys take a look and tell me what is going on?? I just can’t seem to figure this out.

http://www.heritageymca.org/Progressive/meets.htm

and

http://kdilts.serveftp.com/newsite/meets.htm

Thanks!