Appears to be a System Glitch with Unmerge Feature
If you go to unmerge to recapture the older changlog, moving the mixture of newly or previously attached sources by different contributors back to the older PID, the site doesn’t carry over all the sources as “attached”.
Example before merge:
When you go to the “Sources” screen after remerging back to the previous (older) PID, the reattached sources show now as “UNFINISHED ATTACHMENTS”. The source linker also shows that the record is not attached. Trying to reconnect the record only creates a duplicate attachment in the sources section.
Screen example after merge:
This 1910 Census showed "UNFINISHED ATTACHMENT" after the merge. This is after attempted to attach it again.
This was strictly an example to just recreate the issue. If I have this unmerged process correct, then there is a glitch. Appreciate any feedback.