So, I upgraded to the latest version of Metaman v1.0.9 and it broke the Menu Template Style assignment. Try to duplicate a template and change the settings then use that template in one of your menu item. It will always use the default and bypass the duplicate template.
It scared the heck out of me, our website was messed up since Friday evening when I updated. I just remembered that I only change one thing. I upgraded metaman.
Can you please check that plugin, please.