the Qsampler GUI has one bug.
The Audio Device Number and the MIDI Device Number is displayed in wrong order (upside down),
This happens, if you use the Linuxsampler as a Plugin and configure more than one output or input device.
(I do not know, if the qsampler has the same bug whend configured with asio drivers.
First this is no problem for me, if you know this bug and just want to insert a new channel with a new instrument, you just make you choose in the dropdown-list upside down and try to take the "wrong" device number. But if you try afterwards to change for example the midi channel nummer (what is allowed) Qsampler will send not the correct device number to linuxsampler, which results in an ugly Error-Message Box, that the device could not be changed in the Linuxsampler track.
Okay, I can live with that, but its not handy at all. And for my students it is confusing! :?
Please fix this bug. ;)
Pictures are attached in the following Fourm-Thread:
For some reason the screen shot you mentioned is no longer visible from the forum thread you linked. So currently I can't see what you actually had in mind.
Does this problem actually still persist for you or can this report be closed? If it still persists, you might attach a screen shot for making this issue more clear.
I am going to close this report, since I received no further feedback from your side. Feel free to reopen this bug in case you think this issue persists.