UPDATE:
I spoke with Yamaha about this anomaly, and they are as baffled as I am. I opened a case, and they are looking into it. I also ordered the pedal unit that is "supposed" to give the feature I need, but I'll have to modify the structure, because I'm not using the home furniture stand. I need to make this road-worthy if I am going to keep using it. I like everything about it except this damper/sustain issue.
WISH LIST:
Make the layered strings sustain, and make the split bass IGNORE sustain.
Now, we wait.