DGIV moon autopilot broken?!

[Quantum Burrito Meal]

I'm parked at Brighton Beach, pad 1, full tank, all systems "go" (D61->no problems). I want to get back to KSC, so I P905S90, and engage.

It goes well, hovers, thrusts, puts itself on a ballistic trajectory, then kills engines and waits for an altitude of 45k. But the orbit panel displays an ApA of ~44.7k (every time, done this three times now). It reaches ApA, does not fire. Does not let me fire engines to adjust ApA up to let it kick in. It just stays locked into the ballistic trajectory, and crashes.

Does anyone else have this problem? I don't remember this happening back in 08/09 when I last played orbiter.

[Quantum Burrito Meal]

Gah, I had 4 UCGOs in my cargo bay. So the autopilot doesn't work if there is too much cargo in the cargo bay, and can't be adjusted. Oh well -_-. Normally I'd say this is exceedingly lazy design, but meh, Dan makes this stuff for free, I think I can cut him some slack.