This must have been going on for quite a while. Older paycheck transactions, prior to a certain Q patch release, do not display details in the paycheck wizard dialog, but the transactions are still correct with all split details. I recommend you do not try to make changes to those transactions. That'll only make the problem worse.
If you haven't
rebooted Windows since you installed the latest software update, please do so
now and then try Quicken again.
Still not working?
Let's try some
"Troubleshooting 101" to ensure the Quicken software is installed and
updated properly and that your data file is in good working order.
Please perform all the steps in this document:Troubleshooting
101 - Fixing Software Installation and Data File Problems