I've kept track of sheds, and I swear that the distance between some sheds are either because I have forgotten to write them down (which is completely 100% plausible) or they have mysteriously disappeared (which I think is also possible because I'm not that forgetful!). I even think there was a thread around here once upon a time, ages (as in 2 years or so) ago that asked about them possibly eating their sheds once in a while. Maybe not on purpose, but happening none-the-less. I don't believe there was any concrete evidence of it either way.
Cool find!
D80