No further testing indicates it's RF,
all lights and modules respond to "timer" functions and commands sent via the AHP software.
Additionally, I have a 110 ac plug in remote (SmartHome control Link) that functions normally and can trigger stored macros via keypad entry.
I've also replaced a passive coupler with a active coupler-repeater x10 - XCPR.
After reading the rf interference post I unplugged dsl modem and sat tv boxes, just to eliminate any issues from those items.
Other than the swapping of the couplers, nothing has changed in the household..
The CM15a doesn't respond to any commands via the rf remotes, even if the remote is 6 inch away.
X10 tech support thinks the cm15 is bad, since it works other than via rf, X10 suggest perhaps installing a cm13, But I can't find these anywhere or find any documentation.