Hi Mike,
If you are still having issues removing a specific group once you have saved a Kanban report I would suggest reaching out to the Care team via a support case so they can take a look at it with you and see what you are running into. You should be able to remove groups on a Kanban normally while editing a report. You can open a support case from here in Community by clicking Support where it appears in the upper right hand corner of the screen or while signed into Quick Base by clicking on the question mark (?) icon that appears in the upper right hand corner in Quick Base and selecting Manage Support Cases. That way Care can help double check to see what is going on. Thanks so much for posting Mike and certainly let me know if you have any issues creating a case or resolving the issue.
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Evan Martinez
Community Marketing Manager
Quick Base
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