Apparently there were some changes in Google Calendar that had broken the code for the proper display of the Twin Cities Metal Concert Calendar that had long been on the right hand side of the screen as a list. After exploring some alternative configurations, I decided to change the format and layout of the calendar.
The Concert Calendar is now located at the bottom of the page, rather than the side. I've changed it to a monthly calendar view. Clicking on any of the events will give you a little pop-up balloon that will show all of the pertinent details about the show: the full list of bands, venue name and address, any age restriction, show time, and ticket information.
While its location at the bottom of the page isn't ideal from my point of view, I think the monthly calendar view is a big improvement, especially with the ability to quickly view individual show details.