Your spring sale image is too bigger than the bottom junebug picture almost double the size of the bottom picture.It takes too much time for refresh.Generally heavy pictures should be on bottom.
Your site "navigational menu links" (blue colour highlighted) are reloading again when you are visiting a new page.That is bad.That takes lot of time to settle down.
I see only your "header picture" is in a still position when you are clicking other pages.
You must make your theme fixed with "navigational menu links" leaving only to change the new page area.