Put down the torches, hanging rope and tar & feathers, but here goes:
This is the original reason for the dreaded Berm Marshal. Every posse gets the same instructions.
If you've never done a 2hr walk thru with 36 PLs, 6 CROs, a couple MDs and a bunch of assistants I'll let you in on a secret: it's like herding cats.
Even after a grueling Walk Thru there will always be some "can I" question come up or action taken that's not questioned by the TO during the match, so even printing last minute instructions will never completely eliminate the problem.
Until a way to get approx 120 TOs, 36 PMs and 36 APMs that are all completely up to date on the rules and of equal competence is found there will be occurrences such as this.
It's unfortunate, but true, and CAN affect the outcome.