Here's a weird glitch I ran across tonight which reminded me of your library : )
Wonder what exactly is causing it and if it could be replicated via code, but I'm sure it would be nothing like yours ;)
(THIS IS NOT USING THE LIBRARY)
Weird glitch? that I found, that reminded me of the Orbit Library on SC2mapster.
All I did was make a copy of a hellion and change it's speed to 25.
There's 11 of these Hellions not counting the one that's actually modeled and chilling at the top.
Sorry for the bad quality, didn't want to upload a 550 mb 30 second video...
There were times that it would orbit for a very very long time, and a couple rare times that the whole group just kept going in circles w/o order being changed around in the group.