Roku issue

When I "select" my Roku by scrolling to "ROKU" on the U1 and press "OK", even before I hit the power button, the remote sends a command for the stereo receiver unit to power on. Then, when I do hit the power button, the power is then out of sync with the rest of the system. I have to cover the IR blaster when switching the remote to the "ROKU" mode so that it doesn't power up part of my system when I hit the "OK" button. I have programmed my U1 remote with a macro to turn on the stereo, the TV and set the correct inputs for both.