Formatting got demolished!

I’ve turned on WordPress to fix invalid XHTML nesting but my formatting still got demolished on any review post previous to July I made got demolished of all HTML formatting and just looks like oatmeal.
I thought it was my easyembed plugin but it seems that is not the case, I think it has something to do with the header formatting or some other text formatting that got mishandled

For Reference here’s a review back in May containing demolished HTML formatting (with embedded video):
http://www.firstdropshow.com/review-section-8-prejudice

For a review with an embedded video showing including correct headers as well:
http://www.firstdropshow.com/review-hydrophobia-prophecy

For an interview that I had all the way back in April with an embedded video showing and no headers whatsoever:
http://www.firstdropshow.com/interview-frederik-schreiber

PLEASE HELP!