Hello Brian,
Still no luck? You have outlined the problem quite clearly now.
The one thing I'm not clear on with your running the same code on the Keyfob. Are you running the exact same code that only pumps out X, Y, Z on the Keyfob?
Also, in relation to the battery, are you using the same AA batteries on the KeyFob when you do your test?
That would completely eliminate the code and the hardware. The problem would be with your board layout and design unless all the CC2541 where somehow damaged when they were placed on the board.
Thanks,