I thought the comment at the end was interesting, about how sometimes it felt like the car needed a little more front sway to keep the back planted, but other times it felt perfectly neutral or even a little understeery.
I'd be quite curious to know what the overall setup of the car was: all modifications, what kind of wheels / tires, spring rates, etc.
I noticed in the first tank-slapper how many times it wagged before it actually settled down, which made me think there might have been some damping issues involved, and that the car probably doesn't have non-compliance rear toe links and rear beam.
-Mike