Problem with product page (sidebar goes down) I am using Drupalcommerce (CommerceKickstart 7.x-2.0-rc2). 
There is an issue with the display of the product page. The product page is composed of a content and a right-sidebar. Every page that uses this configuration is well displayed but not the product page : the sidebar goes down. 
First I thought about a css problem but I found that it is a problem with the htlm structure : 
- For good pages the markup "aside", that contains the sidebar", is included in the div "zone-content" that is included in the div "zone-content-wrapper". 
- For product page the markup "aside" is included directly in the div "zone-content-wrapper". 
I looked at the files tpl.php of the theme but found no issue (I don't have a good knowledge about templates...).

Does someone already faced with this issue?
Ok, mine is inside an article container. Go to Appearance -> Commerce Kickstart -> Settings -> Zone and Region Configuration and check Content Section -> Content Zone -> Regions.

There should be Sidebar First, Content, Sidebar Second in order. Make sure all of those are in there.

I do know I ran into this issue but mine was CSS related (I changed the width of the content region). Check your settings above and make sure everything looks good. No unassigned regions etc. Try a full wrapper if you don't have one and try without if you do and see if that changes anything.