This is a very new problem for me. When I try to add a new tag for Person X, the tag entry box does not appear with Person X as the Principal. The box appears with my #1 person in the project (the first person I ever created many years ago) as the Principal person for whom the tag is being created, and with Person X for whom I am trying to add the tag as the witness. The type of tag being created does not seem to matter.
What have I done wrong?