Hi Randy,
Are you starting transmission by pressing the right encoder or the left (select) button?? The QMX works the same as the QCX series in that the left button repeats but pressing the encoder only sends once.
I have experienced a lot of glitchiness with the QMX messages.? In my case it appears that most of the problems were due to corrupted message configurations from editing in the terminal with my backspace key set incorrectly.? However, after a factory reset and configuring the messages using the CW decoder it does appear that repeat works properly.? Firmware 1_00_009.
Jonathan KN6LFB