Howdy thestudiodoor,
That is odd. This is pretty clearly a conflict with your theme. I would not be surprised if one of your theme’s templates is less conflicty (technical term for you there) though. Have you tried the various theme options in WP Admin > Events Settings > Display? Check out the “Events template” drop down. You might try each of this, and click Save then retest. Did one of them restore your navigation to functional order?
Let me know if that helped, or if there is something more I can do. Cheers!
– Brook