Display of [app_monthly_schedule]

I just installed this plug-in on my 2nd site. On the last site the monthly calendar composed great. On this install, the calendar is weird stretched taller & wider and the text is running vertically. In both sites, the theme is the same one, and both are on WP 3.5.1. Here is the page that shows the weird composition:


I imagine that I am missing a setting or something. Can you enlighten me?