This seems like an accidental oversight in the program.
I did some work cleaning up my database that involved splitting an individual record into 9 modified records. This is for a gazetteer project, where the original record was becoming too complex (too many facts included). Since it is not possible to copy a record within the database, I dragged the original record into a new, blank database, made edits, and dragged the edited version of the record back to the new database. Nine times.
This caused the Master Sources to be massively duplicated, because the drag-n-drop operation did not automatically merge the EXACTLY IDENTICAL Master Sources. That's annoying, and I'm working my way through the Source List doing manual merges, because even selecting the [Automatic Merge] has no effect.
What is worse is that the underlying Source Template has been duplicated 9 times, and there is no tool provided to merge these duplicates into a single Source Template.
Huh? Any suggestions on how I can clean up this mess?