Quote - I am using IE10 as I stated above, Tina. I generally have my window set to 125% zoom because it's easier for me to see things - especially here with the images in galleries. I thought this might be the problem with the sidebar overlap but I set it to 100% and still have the overlap. I did - just now - click on the "Compatibility View" icon in my browser window bar (the 'broken page' icon) and it fixed the overlap on the My Gallery page. So, evidently there is an issue with compatibility with IE10, if not IE9, etc. 

 

Activating Compat view in IE 10 will typically throw it into IE 7 standards.  If, when in IE 10 you hit f12, you will get a developer menu.  If you look at the 'title' area there is a selection for Document Mode and Browser Mode.  If both Browser and Document Mode list IE 10, and the page layout is broken, then the page (HTML or CSS) does not confirm to IE 10 standards markup and will display with a 'broken' layout.

In short, if you need compat view on to view the site correctly, then the site does not follow current standards in one or more places.  For me, in IE 10 - activating Compt View breaks the homepage badly.