Now that I am home, some things I found.
The coax end on the Set 2 coming off the booster plate was a loose/bad connection. Once I found this, I got signal to all outlets as expected. The plate Jayco installs is the Winegaurd, upon closer inspection.
After hearing some other folks in Topsail Hill talk about poor cable signal, I think that may be part of the issue I was having, too. After fixing the bad cable end, I found we would occasionally lose signal during bad rain storms to the 3 other TVs. These are on a 3 way splitter off the Set 2 connection. Thus, less signal to begin with.
So, all that said, I am going to order a 1 port cable booster for $20 off Amazon to boost the signal to the whole RV if I notice the issue again.
2003 GMC Serria 2500HD - Lotsa Mods.