[Checkyersix]

HOWEVER -I had completely forgotten about this-, the AI will fail miserably to land YOUR OWN aircraft if you turn on the autopilot. You have been warned (this is a known 'issue')

That was the problem, I was testing it in QMB and assumed the AI would fly my plane as they flew theirs. I tested in FMB with all AI planes and they landed beautifully. Thanks for the help and sorry for jumping the gun, guys.