HDHomerun Dual does not find any channels, DVB-C

Location is Finland and Welho DVB-C network. Console logs show this (among other things):
get_tuning_string: a8qam64-6900:386000000

Does this mean that DVR is trying to find channels from QAM64? That is not in use: Welho uses QAM128 and QAM256. Modulation parameters from Welho website (dvb.welho.fi) are:

Network ID: 42249
Modulation: 64-128-256QAM
Inner FEC: None
Outer FEC: RS(204,188)
Symbol Rate: 6,8750/6,900 Msym/s

The QAM64 is not currently used, and few channels use the QAM128. Is this an issue with the DVR or my HDHomerun Dual? Do I need to setup HDHomerun again?

The tuners do work with EyeTV and TVHeadend.

did you resolve this, I’m having issues with channels also. Seems like wrong QAM settings…

No, this has not been resolved. Must be the QAM-settings, but there does not seem to be a way to edit channel search from DVR Setup. One can choose from service providers, but that’s it. I don’t know if newer HDHomerun-models (4DC) have this issue.

I have the same problem.
An advanced channel search where you could manually specify the network id, frequency, symbol rate and modulation would be a great feature.