Hello Kristian
Have you checked Event » Settings » General » Recurring event instances? You can select do only show the first instance, or turn that off if it was enabled.
The other thing that might work for you is an additional plugin we’ve created to list organizers: https://theeventscalendar.com/knowledgebase/listing-venues-and-organizers/.
A final option might include this shortcode instead:
[tribe_events_list organizer="yes"}
However, I think that method would bump into the same recurring events possibly.
Let me know if any of these help you.
Thanks,
Courtney 🙂