Yep, it was P/UT and you logged it correctly. If you had done it as P1, not at that point having been signed off for tailwheel differences training, you would have been exceeding the privileges of your licence. Same comes when you are doing your retract gear, supercharger, CS prop, etc etc. Obviously also the case for IMC training, MEP, night, or anything else that varies your licence, rating(s) or counts as part of your licence in that sense.

You may point out to whoever said “students only” that that one may on many occasions be a student with a licence.