Hello Margaret,
Thanks for using Events Calendar PRO! Let me try to help you solve your problem.
Could you please provide an address where I could look at the issue?
This could also be due to a conflict with a custom theme or a plugin. I can see you already did a test with deacitvating all the plugins. Can you confirm that the problem still existed when only the Modern Tribe plugins were active?
Could you please also run a test with a default theme like twentyfourteen or twentyfifteen and check whether the problem still exists?
Cheers,
Andras