It would be (a tiny bit) interesting to find out if Justman wrote *any* dailies-related memos during filming for TDM. Was he around? Gone? Sick? Vacationing? If there's nothing at all from him, that might explain why he missed a Decker's-insignia mistake.
I just moved to Montana, so someone else would have to check. There ARE Justman authored memos about the episode -- but I do not recall if there are any related to production or post-production.