Open the first album, select a photo, display it and pull up. At bottom you can now see the location.
Then do the same in second album.
Compare the locations. It is possible that the first album is in an old location and is obsolete. In that case just move it's content to the new album and delete the old one.
I thing that Facebook changed the folder from Pictures/Facebook to DCIM/Facebook.
Just move all pictures from Pictures/Facebook to DCIM/Facebook. No new folder should be created. You can delete the empty folder.
If you are advanced user, you can use Tasker to detect creating new file in Facebook folder and move it automatically where you want. Bixby Routines unfortunatelly cannot do it 😞
If my answer helped you please set is as solution. If you want I can create a video how-to for Tasker