I tried deactivating and then setting up the account again. Then closing and opening Quicken, but still the One Step Update doesn't pull transactions for the 9th account, the credit card account.
Not sure if it matters, but my old credit union merged with a another credit union this year. I started from scratch with a new Quicken file, so that I would pull transactions for the new accounts. That is when this problem developed.
[Edited - Readability]