@Andreas_Pfenninger
Yes, that’s all correct.
Without doing a full forensic analysis I can’t be exact with the issue. You have been creating events since 2020. You have many of them grouped together. I would bet that you have clones that are so old I’m surprised they run at all.
You can clone.
We just suggest you follow our guidelines. If not there is a chance if your match/event breaks we may not be able to fix it. Here is info about cloning.
As far a matches created farther out then 30-60 days.
IF you are hosting something like a national or regional championship. Where people need to plan for vacation and travel. We are OK with a match created, say 10 months out. And we will help if it has an issue. But, if must be created from scratch so it has the most up to date web code to help preclude any issues.
Regards,