divs out of place until i refresh the webpage?

[theregoesjb]

I am working on a site and have 4 slide shows contained in seperate divs, it is all working so far but when i load tthe live page in a browser some of the divs are out of place. If i refresh the page the problem is fixed, but i have had to refresh the page twice sometimes (3 times loaded total) before they fall back into their correct location.
(tried in firefox & chrome)

What could possibly cause this?