This is my 2 cents. I used to play this course consistently 3 or so years ago (Grew up in Hanover, moved to Harrisburg). I still occasionally play it, but not as often as I'd like. When I started, there was only one course, the blue course. They added the Red course later, and most recently the Xtra holes and Cross-country course. I usually stick to the blue course, it's usually open and less crowded (lot's of picnickers flank the red course).
My round is usually to start on hole 10 of the blue course and play through, occasionally crossing the street to the extra holes after hole 12, then meeting back up at hole 13 to finish out the round. So, 18 holes with 10-12, 1x-9x, 13-18. And I'll call it the day.
Conceivably, you could play 10-16, then cross the street for the extras, and come back to 17-18. or you could play 1-9, cross the street and play just 10-18, no extras. I'm just pointing out that the layout of the course could be construed as multiple layouts with up to 27 holes for the Blue course and 27 holes for the Red Course. But, in my eyes, I'll only see it as 2 courses; the Red and the Blue.
Maybe if Jay adds another 9 holes to the Xtra or the Cross-country, where you could start and finish 18 holes there, then I might consider it more than 2 courses.
I don't know if that adds anything to the conversation or not.