... Now here's the problem. I have taught this command/sequence to the 1100, but it does not seem to send both signals successfully. It only seems to send the play/pause signals to the BD player. Is this because, when using a sequence-created command learned from another remote control, the 1100 cannot send both IR and RF commands, even if the devices are set up that way in the software programming?
Get a digit camera and try and judge how long the HO displays the IR signal for that command compared to the 1100 and to the RF Wireless Extender.
If there is no signal from the RF WE then you know that is the source of the problem. If it is shorter than the HO it means that you are back to the base problem. Try learning the command again. It that does not work you will have to use tow different key presses.