Hi guys.
The cache was only active during the morning hours. It was ruined in the early afternoon on the first day. So I believe it was a geocacher, or someone who trolls the site anyway. That makes more sense than a muggle noticing cachers, looks in the tree, runs off to crap and pee in a jar and then brings it back to make the swap. The poor guy who discovered the swap, his observations make it pretty clear that whoever it was turned up with the jar ready to make a swap, and is probably getting a kick out of this thread.
If he is, just know that you were seen, and your vehicle was seen.