Weird < /div > tags in teaser view caused by Collapse Text

The right sidebar is pushed below the content and it happens in teaser view like blogs and default frontpage. At first, I thought this is not due to Collapse Text module but when I unchecked "Collapsible text blocks" from text formats the display is back to normal. I followed the module instruction that arrangement should be after "Limit allowed HTML tags" and after "Convert line breaks into HTML". With contents using the same text format but no [collapse] code in the content, this did NOT occur. This also do NOT occur in full view of nodes having [collapse] or with NO [collapse] code.

I checked the source code of my front page and their are weird closing tags for div's in every teaser of the page continuing to the footer.