A quick way to check if you are backing up all of your User Libraries is to use the little known command EDTBCKUPL....
This command shows you the change library backup list menu. You need to look at the columns library last backup and changed. If changed is yes and last backup was not your last backup date, you may have problems. If you F4 the command, you can also see the data for *FLR(Folders) not IFS.
Please note: This tip is valid only if you use Operational Assistant to back up your system. Ken Graap, Search400.com backup & recovery expert.