To be clear: Your commands still use the original XbmcTvChannels.xml payload XML file.
If you look at the command itself, you can see that within the command it's still using the XbmcTvChannels.xml file. The other file is just for you, not for Kodi.
There is, I'm sure, a way to get information about the channel you are watching. But as I said before, I don't have live TV so I have no way to figure this out.
I gave you links to 2 different Kodi pages that list a large number of different commands you can use with Kodi. It's Kodi that determines what you can ask for, and what kind of information is returned, not VoxCommando.
I suggested that you go look at the keymaps web page and see if any of the listed actions would be of use to you. Did you try that?
For example, one of them is the "info" key. The Kodi web page describes it as:
Show the information about the currently highlighted item, or currently playing item.
Maybe that "Info" will show you the channel number and channel name -- I have no idea.
If it doesn't, then you can go ask on the Kodi forums what kind of querying you would need to do to find a channel number -- if it's so important to have the channel number. Or whatever information it is that you want.