[hcobb]

7.12.1 "Infantry mounted on [a] vehicle[] are always a [separate] group."

Unless you wanted 3xLt Tank to make a 3/1 infantry group.

"Turn sequence – 5. Second (GEV) movement phase."

You just reintroduced my scenario. PU GEV-PC enters a swamp hex and is disabled so Combine GEV-PC overruns the same hex and is itself disabled by terrain. What happens next?

FAQ 7.05.1: I'd add a tiny example about 1xAP fired on two stacked trucks in clear terrain which automatically destroys one and disables the second one on a roll of 6.