I made my roombounds and connecting portals sometime back, and I'm super fussy about them and checked everyone in game. Now after edits to a great many others things and multiple saves and reloads they have moved, not just one or two but it appears like the whole damn lot of them. It appears to have happened across all my dungeons and they all seem to have moved by only a smidge, I click on them with snap and they (like they should) jump back onto the snap.

This is annoying because I can't trust them to stay where I left them and I'll have to wait right to the end of the project before I can set them straight.

Use FNVEdit to save them as override in an second plugin.

Once you are done, override back to your original plugin.