What I would do is leave the tag as is, and add a note to it about being "maybe?" or "disputed," or "cross?"
Betcha it is okay as is. If the plant continues to recover, it will bloom better -- including more blossoms. I think crispa blooms like a purpurata with 3 to 7 on a spike. (I think)
Have you inventoried the whole collection? Any divisions available?