sidebar gone rogue

can anyone help me understand why my sidebar has decided to appear under posts in single post pages (all is fine elsewhere). The only change i re cently made was removing my theme’s (Destro) default social box from top and bottom of posts as i started using a designated plugin (WP Socializer).

link to a single post page on my website: http://hazavit.com/?p=1034

here is my current page.php code:

code removed by moderator, use a pastebin for large code sections