@siannan, thanks for your help.
I tried your suggestions with no luck! The “Show global events on main site” setting was selected so I unselected it but it did not fix the issue.
I also tried including the sites I don’t want as negative IDs but that did not work either and categories would not work for what we are trying to do.
Would be great if someone from the Events Manager plugin could shed some light on why this is working for @siannan but not for me.