Doug,

I'll throw one more thing at you:  If you can't set the squelch to your 
liking via the control panel, maybe you   can edit the config file.

I've found over the years that some programs that aren't very accessible 
in the normal fashion  can be  tweaked   via the configuration file.

I haven't done this, and can't promise it will work, but may be worth a 
try.

You will find the file under the  mmtty folder of your programs files 
folder.  It's just a text file and will open with notepad.  I'd suggest 
backing up the file first just to be safe.

In the text file you will see:
"AFCSQ=32"  which is the AFC squelch you find  under the "setup mmtty" 
dropdown menu.

Further down is:

SQ=0
SQLevel=6.000000e+02

I'm wondering if changing the sq=0 to a higher number  may be the same 
as changing it  from the control panel.   I have no idea what the second 
line is, and I wouldn't mess with it myself, but you may be braver than me.

Even if this works, it's not something you would do on the fly while 
operating, but  maybe you could find a setting that gives satisfactory 
results.

73, Steve KW3A