These sound very much like the same bug I had reported in https://www.geni.com/discussions/223064 and to Customer Service.
Customer Service told me early Feb. 2021
"Thank you for the examples, they have been sent to our engineers. The profiles affected appear to be older profiles created in 2012, 2014, etc., but our engineers are trying to determine which profiles are affected. We currently have a manual fix for these to reset the creation revision, so all the examples provided have been fixed. "
And on Feb 25 2021 Customer Service told me "The fix we have to reset the creation revision has been included in the code for merging and undo merging. So going forward merges of an old profile that was showing the incorrect name in the revisions will show properly in the merge revision page and if a merge is undone, the correct name will show on both profiles such as David Nail and David Nail instead of Rachel Nail and David Nail." -- but this fix was for merges done after the end of Feb.
