I get from Post 8 that he reset the remote to factory default. Read it with me: he says he reset "it" to factory default...
I was trying to keep the old configuration
That is, he lost the old configuration, which resetting the remote to factory default does.
just in case (partially to demo how poor the original programming was) but I had to ditch it for the reset.
Yup -- had to ditch the old original programming. He reset the remote to default.