Hi Don,
Thanks for reaching out and welcome to the forums! Sorry for the trouble here with the theme menu on the calendar page–let’s see if we can figure out what’s happening.
First off, will you please follow the steps outlined in this guide? It will help determine if the issue is in the calendar, or if it’s a conflict with the theme or another plugin–and, if so, where that conflict is.
If the issue still pops up in those conditions, then will you please head over to Events > Settings > Help, copy the system information at the bottom of the screen and paste it here as a private reply? That will help me see you settings and be able to test things out on my end as well.
Lastly, I do see a Javascript error in the console when viewing your site:
Uncaught InvalidValueError: not an Object http://www.legion.topqualitytestserver.com/:18
It would also be super helpful if you could clear that error, as it is possible that your submenu relies on Javascript and the error could be interfering. If you have access to the theme author, they could likely help resolve that error with you.
Thanks!
Geoff