When i click through the menu items on my site, occasionally my footer module will load in the wrong place. Instead of appearing at the bottom of the site – it appears at the bottom of the screen – it shouldn’t appear there! Anyone know what is going wrong?
Here is a screenshot of the problem:

Here is what it should be (i get this by hitting refresh)

And here is the site (if you want to try for yourself!) http://www.freevolunteerabroad.org/mad4phil (it is a test site, hence the strange name!)
Any help would be VERY much appreciated. I am doing this site as a volunteer for a charity, so i guess helping me is even more of a charitable act then it usually would be!