Thank you for the screenshot. Seeing is believing :-)
Can you describe a little bit your setup?
I am using the latest official raspbian,
the firmware files for my 292e stick as described above,
and at the weekend I compiled the latest v4l (media_build).
Further I compiled the latest TVH from the repository.
But no matter what I do, I only see DVB-T or if I use the tricks described above then I see DVB-C, but not together as in your screenshot. Do you have -by any chance- an idea what I could be doing wrong? Or how does your setup differ from mine? Which firmware files are you using?