Trouble with Accessories using the Dynamis system

[StevensonDW]

Anyone else having problems with this ... I have no problems setting up Loco's, even deleting and renaming isn't a problem.  I even have two consists ... no problem.

I have on 12 turnouts on this layout, and I can never seem to keep the turnout addresses locked in the handheld.  I set them ... run the trains, use the accy's... hotkeys or by scrolling, no problems, then in about a week, all the accessory addresses are gone, and I have to re-program them, This has happened about 4 times, now when I go to program, I cant even program the accessory address in, so I am up a woodlands scene creek without an ho scale paddle.
I am about ready to hit the factory reset button and re program all the accessories, switches, and loco's.
Any help out there?
D