Recently tried to delete a project from the MP page for the common reason that it was an unwanted subpage project.
I selected "delete all project and source files" because I wanted to delete the project directory. WW additionally (or instead) deleted all of the tags from the relevant page.
When I went back to the page, it had no tags, but was still associated with the unwanted project. It is not clear to me why, but I guess that some part of the PD was not deleted.
Suggested behaviour is to delete the project and PD (if the latter is selected) while leaving the page alone (the screen could suggest that the page should moved or deleted first, if that is desired).
Anonymous
Solved my current problem by doing the old-fashioned move of deleting the PD, then restoring the 10 or so automatic edits.
Very sorry! Sounds like a real pain.