Marc,
Welcome and thank you for the kind words! I would be happy to help assist. I’ve included a plugin at the end of this response which helps clean up the duplicate recurring events. It will appear in your WP Admin > Tools after you’ve installed and activated it.
I notice you’re running outdated versions of our plugins. Can you please update to the latest versions released and review the Testing for conflicts guide to see if you can reproduce the issue?
I recall a bug similar to what you’ve described, but I believe it was recently addressed in a maintenance release. Please keep me updated on the status of your issue and have a great evening. Cheers!
tribe-extension-recurring-cleanup