I tried something else...

I got into settings and turned on the option to let Armory run Bitcoin Core in the background.
I put into the 'Bitcoin Home Dir' field the location of another Bitcoin installation on an external drive (HD).
The default installation I have on my C: drive is a SSD drive.

I still run Bitcoin Core manually before starting Armory and everything starts normally it seems.
Everything is sync'd up to the latest block. That missing tx shows now with the correct number of confirmations.
It looks like Armory is continuing to stay in sync as more blocks come in.
It showed 466380 in the bottom right when I first started it and right now it shows 466381.

/edit: The only thing seemingly not normal is that when I shutdown Armory, ArmoryDB stays open and I need to shut it down manually.