Hi,
Can you copy the HTML code using the <HTML> icon on the Saved Listings page to the practiceboard for one of the problem 24 examples you describe.
Are you adding any special "widgets" to the code from other 3rd parties?
Danno
Edit: I noted you are adding a fairly large table on the prior example you posted. I do know that failure to properly close some HTML tags (especially TABLE), can cause havoc in the code and the template to look weird.