Okay, I set up the website last night, everything was working fine. I launched it and it has worked all through today until about 1-2 hours ago the formating on the home page decided to change. All of the center type "in the announcements section" jumped down to the bottom of the page leaving a BIG BLANK SPOT. Why, why?

I did not make any changes except to add text on two deceased classmate pages.

The links you put in your Announcements box are too long to fit on your page and thus they force your Announcements box out larger than the space available. And when objects overlap, Firefox just bumps them down on the page until it finds a place they will fit. Simple solution to your problem is remove the long hyperlinks and embed them behind clickable verbiage instead. Very easy to do with your link icon in your editor.

For a detailed explanation of why Firefox does this, see this thread.