Up or Out-YGTBSM.

Takes Two to Tango-change either of the crew members and this might have been a whoops, made a mistake and caught it.

The Capt didn't make Capt because he bought a bunch of UPS stock or had incriminating pictures of his instructors. He went through an FAA managed training program and passed. He might not have been Steve Canyon, but none of us have to be.
I've got no way of knowing why he chose to withdraw from his earlier Capt training events. Family stresses, maybe the realization that with the economy going in the dumps he was going to be wicked junior for awhile and would rather maintain control of his schedule. Maybe his instructors pointed out going to a computer jet and a Capt seat isn't the normal progression at UPS. Goodness knows I had more than one instructor tell me I shouldn't be able to go from a FE seat to a widebody FO seat.
He is certainly not the only Airbus Capt who's had the occasional difficulty with the whole P.Des issue....I've had way more than one Capt tell me to "set up" the FMS for the RNAV\VNAV approach.

The bottom line is they made a mistake, and failed to catch it. The WHY they failed to catch it is still to come (and even then it's just the best guess, most likely for a mishap of this nature)

I would be willing to bet that if we asked the FO's who flew with this Capt and the Capt's who flew with this FO they'd have said He\She wouldn't make a mistake like this.

Distracted? Fatigue? Training? UPS RNAV Procedures? Poor Judgement? Fear of Mgt? Disconcerting to read that one of my fellow pilots would just stick to the schedule even after telling one of the buds about falling asleep on every leg and being tired. UPS is going to maintain that they are a fatigue friendly company, but clearly many of their pilots do not have the same perception.