Gene, I knew that, had a hell of a time getting it sized for the Bulletin Board - definitely not image friendly.
I recall Pete measured an out-and-back course that had something like a dozen distances on it, each w/ a different TA point. It was extremely clear, however.
There is also the case of a single-distance course where some intermediate splits are certified. In that case I think the course map should be accepted.
I am heading out right now to put down the marks for the above course (the race organizers don't trust themselves to do it right, and they pay me for an hour's work with a can of spray chalk). I'm definitely bringing the combination map with me - no going back & forth between 2 pieces of paper.
Perhaps this issue is best approached on a case-by-case basis. If a multi-course map is clear and relatively concise, it can be used for 2 different certs; if not, different map for each. I understand and agree that there must be a distinct cert for each course length.