bubblegumbaby theme problem

Hello,

i got a problem with my site, i download the theme “bubblegame baby” from https://www.grabatheme.com. The problem is that in Firefox everything looks great, but turning on IE and watch the site then, the sidebar turns to the bottom and the text area to the right.

Please advise on what to do.
Thanx, Evert

(my site: https://www.tranquilostyle.com/sxm)