I really apresiate any help of how manipulate this buttom(knobs)this post its going down

The default A321 is particularly bad when it comes to defining the "click" spots on the various gauges.
I noticed last night, in the VC, that the radio tuning "knob" does not work for the "units" of frequency.
It does work for the "decimal" portion, but since a roll-over of the decimal readout does not increment
the units, I have to say it's "broken".
One solution to your problem is to change the size of the "click" spot areas in the A321 gauge. That
is something that I determined I was going to do after last nights flight!
You would need to "de-cab" the file into a folder, then go into the various XML files in question and
locate the mouuse click specifications....usually at the end of each XML gauge listing. You can then
increase the size or even move the "click" spot areas, say from the knob up to the readout.
If you have any experience in programming, it's very easy to do.
Other than that, there's not alot you can do. I know that in the VC's, I have to "freeze" my
TrackIR4 Pro whenever I wish to adjust a control.
I really can't believe Aces ever "flew" some of the default planes or used them in the way any
normal user would. Their defaults leave a LOT to be desired!
Paul