they do when not all of the nodelists exist there...
then there's also the time when it would take months for Z2 to pick up and apply Z1 nodelist updates... like the system i was first involved with... according to the archives of Z2 nodelists, it wasn't listed until months and months (years! actually) after P4 was put in place but in reality, that system participated in the whole P4 thing as well as being involved in discussions about P4 when it was first presented to the network via the fidonet newsletter before undergoing modifications into what it finally ended up becoming...
P4 was put in place June 9th, 1989 but the nodelist archive shows our system first appearing in the nodelist Oct 29th, 1993... in fact, the nodelist archive shows 1:275/0 as not appearing until July 6th, 1990 which is definitely wrong... in fact, net 275 and whatever net was just to the north had a bit of a recruitment battle before the '90s... yeah, one of those geographic and phone LATA battles... hell, i remember when Warren King was first selected as NC of 275... the nodelist archive is not accurate... it is a valient attempt, though...
so please, let's not try to measure penises by using a flawed nodelist archive as the measuring stick, ok? ;)
)\/(ark --- SBBSecho 3.11-Linux * Origin: SouthEast Star Mail HUB - SESTAR (1:3634/12)
