Using "More" tag, breaking the page, again!

[CarpetGuy]

Ok, Paul, Craiger, both of you helped me with this before, when setting up the News theme, it went away and we never found out what and why it happened. I have just set up a new site, a subdomain/directory, installed the theme, plugins etc. During modification, I added several categories to the home page, all set up now, and just to look at spacing etc, I am using only 1 post, so that all are identical, and have that post in all of these top-level categories. I put in 5 paragraphs of Lorem Ipsum text and a "more" tag after the second paragraph, to shorten it. each was fine, before the "more" tag. Here is the link, thanks, I need to know what I am doing to cause this! http://sports.opinionhead.com/