if i had to guess, (a) you came up with a natural layout around campus and after all the hard work and putting up markers and flags, figured out it's a few cents short, and fudged it.
or (b) the course was a measured 5k at some point but when they put in a new athletics lockerroom or school building or stand of trees, and you diverted the course, the distance slightly changed but you never measured, because "it's a 5k course and always has been."
i agree that it's like a track/ranking mentality that wants it neat, tidy, and exactly what it's supposed to be. it's a point to point race.
we used to run our area championship every year at this mean hilly course and i was good at it. i loved the place. maybe it was running all those hills calls on more of an athletic soccer fitness and less of a pain cave endurance version. i agree with the poster re we need more terrain and hay bales and whatnot. the whole point is it isn't track season and handling the course is as important as time. in which case, same course for everyone. so what if it's 4.99 or 5.01.
i am not much of a preppy and don't play -- but how about "like a golf course?"
personally i found boring the "run around an open, flat field as fast as you can" xc races.