Sorry for the delay in reply. I am on vacation in Australia, and though I had good access to email in Sydney (and now in Cairns) I was cut off out in the Red Centre.
When I get back, I'd be glad to take a look at the missions, but I agree that it will be difficult or impossible to track landings per pilot, though you MIGHT manage it per Briefing Group (and if each pilot is in a separate briefing group..there is a chance) but you will still be constrained, as far as I know, by the debriefings reflecting only the first TRUE statement, so 2^n statements are necessary to specify all cases to assure a debrief...