UPDATE:

Well, I thought I was home free after I updated the 77" and it began responding to the codes. I then moved to the 65" and it actually worked without needing an update. So I left that one alone. I went back to the 55" I started on, and did the firmware update. Still no joy. I rebooted the TV, re-loaded the codes and nothing. Not sure what to make of it at this point. I know the emitter is in the right spot. I have the repeats correct. I also tried moving the emitter and changing repeats without any change. Something fishy going on for sure.

So 77" did not work until the TV was updated to latest software, 65" worked out of the box, and 55" did not work out of the box, and still does not work after updating to the latest software. Only other difference is the 55" is controlled by MX900 and the other 2 are MX980. I will let you know what the solution ends up being.