Thanks.
The only reason it matters (and I am still kicking myself for this)… I managed to lose my original logbook (I think it was dropped between the club house and the carp ?), so I am now rewriting a "duplicate" logbook (all 745 flights worth) from an electronic copy I have on my PC.
I always suspected some of my instructors were trying to help me gain increased P1 time by telling me to log as P1/S in place of P/UT, but your right it really doesn't matter for me so I want to make sure it is logged correctly now.