Has the dealer put it on examiner to see if there are any faults recorded in the Selespeed ECU?
If the pump isn't priming when you open the door (it won't do it once it's completely up to pressure, say after 5 openings-in-a-row), I'd take out the pump relay (black one under the air intake pipe) and give the contacts a good clean. While you're in there, give the main actuator loom connector a clean and re-fit as well
. It's a big (20-way IIRC) connector under the battery tray (or somewhere in that vicinity).
As I understand it, the sele system will down-change for you automatically when approaching junctions etc, but should leave you in 1st or 2nd ready to drive away. If you're down-changing yourself, you might be knocking it down into neutral(?). Failing that, you might
have a dodgy speed sensor...
Irrespective of it being in working order when the dealer sees it, any faults will remain present in the ECU memory. I doubt they'd miss the opportunity to read them and charge you an hour's labour for the privilege though...
Investing in AlfaDiag and a diagnostic lead (Rarebear on here sells them) would give you the ability to read the ECU(s) yourself, as well as do the 12,000-mile clutch rod length adjustment procedure and other diagnosic/recalibration routines. This works wonders on Selespeed systems