I just want to follow up on this issue that I posted 7 month ago and describe my solution to my problem. And thanks Geoff and Eddie for good replies.
As Geoff points out the X-Touch Mini's setups can be edited with a editor program including setting a device id that is handy to distinguish between the devices. My frustration was that this device id was not reflected in the port name. After some communication with Behringer support I found out that this was not a bug and the id was mainly meant for the bigger X-Touch models that use the same editor program.
I then realized that a more flexible (yes, and complex :-) solution would be to have identical setups on the 4 devices except the global MIDI channel (can be set in the editor program) and process the MIDI CC streams in a dedicated cross-bay-like program where I could translate the CC messages as desired (momentary, toogle, note, etc) and map to virtual LoopMIDI ports that is used by the destination DAWs and other programs. This also allowed me to add other controllers and use the same controller in different programs.
So what to use as a cross-bay-like program? MIDI Ox couldn't be used because it couldn't save a setup with identical named devices. Then I tried the Bome MidiTranslator Pro that could do what I wanted and is relatively cheap and straight forward to use. There is a free Classic version but I'm not sure it can do the job. Finally I bought the full Max8 system on sale that can definitely do the job. It is a much more expensive, clearly overkill for this job, and have a much steeper learning curve, but allows me to do much much more. Now everything works great with a setup that can be loaded, tweaked and saved, e.g. where each X-Touch Mini is controlling both individual monitor mixes in RME TotalMix and instruments/effects/loops in Ableton Live at the same time.
So I you run into similar problems with identical named MIDI devices (and the OS do not add numbers like it should as Eddie points out) my advice is to create virtual MIDI ports with LoopMIDI (https://www.tobias-erichsen.de/software/loopmidi.html
) and map the device ports to the virtual ports with a tool like Bome MidiTranslator (https://www.bome.com
/). There may be other tools available for both tasks.
cheers /// peter