text outside post area with mtouch quiz plugin

I believe I have a peculiar problem with my blog. I use the the theme WP-Clear by Solostream. I am trying to create a quiz using the mtouch quiz plugin on a “salespage” template, narrower in width than regular page width.

The text on the page appears fine so long as am LOGGED IN but if am LOGGED OUT, it breaks the boundaries.

Problem does not appear if quiz published on normal page.

Here’s the link http://www.petgoldenretrievers.com/dog-training-quiz/. The text appears outside the post box when the page is refreshed once or twice. Will appreciate guidance on this. Have already tried deactivating cache plugin, altering post widths, adding word break code. Where in the theme should I make the alterations?

BTW, the plugin creator said he didn’t face any such problems when I sent him the link. He’s currently traveling. Could it be my webhost?