You are very inattentive, I emphasized in the quotes those places that you did not pay attention to:
You see, the process has begun - you yourself see an improvement in the spectrum.
Now God himself ordered to double-click on a frequency of 21563700 kHz.
Before that, try to mark the TBS 6983 checkbox - it will not be worse with the TBS 6903 card
I carefully considered your spectra and I want to give advice (recommendation)
Try scanning with parameters:
SRmin = 100
SRmax = 6000
NF = 1.5dB
And do not forget, after the end of the scan, double-click on 21563800 and 21607000 kHz, and then Save - Paint - Save
I want to see an HR spectrum in TBS 6983 mode, which shows two FeedReport results in the same mode, and which are saved with first Save. The results after Paint - Save you showed us in your last post