Agreed. I just wrote up a list on scrap paper of all of the mods in Pathfinders, crossing out any Royal Marines and British Steel had in common with it. I'm counting 7 mods Pathfinders has that the other two don't ( 3 mods by Massi, RDS, BAF Landrovers, JBAD and ARP Objects). And Patherfinders also has slightly different init files too.
Seems like it might be a nightmare to fully test this so I'll probably just leave well enough alone and call in my units blindly with Logistics.
Sorry to waste your time on this witch hunt. For such a minor inconvenience in the mission, the fact that you even looked Ito it at all means a lot. I appreciate everything.