Hi @887155 ,
it seems the .com1 and .com2 commands don’t accept any explicit 8.33 kHz frequencies.
When I try to enter e. g. “.com1 122.805” it won’t set this frequency in the COM panel. Any non-8.33 kHz frequencies work without problems, e.g. “.com1 (or .com2) 122.650” will tune this frequency.
Using stock MSFS, and usually dialing frequencies directly on the COM panel, but would be great if this could be corrected/updated. 
This is a historical limitation of SimConnect. It uses a format for setting frequencies that only includes two decimal places of accuracy, so it cannot work with 8.33. It should still be updating the frequency shown in vPilot, though, so you can still communicate with ATC on VATSIM using those 8.33 frequencies.
Note that the above is true for the older sims that vPilot supports. MSFS has introduced a way to tune 8.33 freqs through SimConnect, and I will update vPilot to support it with the dot commands at some point, but it’s not critical because for MSFS, if the aircraft supports 8.33, you can just tune the frequency in the aircraft anyway, and the dot commands are not necessary.
I had the same problem with vPilot so do this. In the remarks type .com1 122.105
Nothing else, that will do the job.