Events+ Upcoming Events Widget - Blows up sidebar

When I put in the upcoming events widget, my sidebar blows up. It looks like the calendar is 400px, and the upcoming events (hidden div until clicked?) are pushing my normal sidebar items out of the div.

Image included - click

I disabled it for now, but could set up a time to turn it back on if you want to test it.

Thanks!

http://reptile411.com/events/trade-shows-expos/