Thanks for the advice, but as I suspected, after deleting the two .deb files and verifying they had been removed, rerunning the update and/or upgrade process rebuilds /var/cache/apt/archives and puts them right back with the same error being generated since these two files are fetched in the upgrade process.
I appreciate your help. If you have any other ideas, I’m all ears. Short of reinstalling FerenOS and rebuilding, I’m not sure what else can be done with a broken dpkg package not being able to execute a split package reassembly (dkpkg-split). I did roll back my system 6 days from a daily backup using Timeshift, but apparently I waited too long and the 6th day in retrospect contained the broken dkpg as well.