There are settings that determine which accounts and services get updated when you do a One Step Update, and these affect what is displayed at the end of the update. These are sometimes displayed at the start of the OSU, or via the Settings button on the Password Vault dialog.
Also there are checkboxes at the bottom of the OSU Summary that control what is displayed and whether the summary is displayed only if there is an error.
Note that you must be very careful if you are accessing the same Quicken file from two computers. See this Support post
https://www.quicken.com/support/can-i-share-my-quicken-file-between-multiple-computers-using-dropbox
I believe you are seeing the effects of the fact that the last update times for your accounts are not stored in your .QDF data file. They are stored in a file named runtime.dat which lives somewhere in the C:\ProgramData\Quicken\Inet folder. The exact location is data dependent.
So when you copy your data file from one machine to another, you are not copying the last update times. I also copy my data between machines, and I find it regrettable that the timestamps don't come across with the rest of the data.
PLEASE give us an option to show ALL accounts downloaded each time. Now it only shows those with transactions. I would like to control this function myself, not have a feature taken away.