F/o handling time does go down as P1s, (but not PICUS - thats more for command line training).
P1s should not be included if your are asked how much P1 or command time do you have? I heard the Atlas STN recruiters were getting irritated by applicants putting lots of P1 time down on the form to find on meeting then that most of it was P1s.
I think the US is different.