Not sure this is the answer to your problem, but check menu 007. 
Default is "off".   If turned "on", memories are tunable with the VFO knob.


If this menu is currently set to "off", then obviously it is something else.

73, Steve KW3A


On 3/11/2014 1:46 AM, Jim Gammon wrote:
> Hi listers.  I got my 480 into a strange mode where, when I go
> into the memories, they are now hooked up to the VFO which I have
> never experienced before.  Now, if I am in a programmed memory,
> and tune the VFO, it will change the frequency.  I must have
> punched a button, but I'll be darned if I can figure out what I
> did to cause this, and would really like to put it back the way
> it was before.  I bet the 590 has a similar feature just like
> menu 34 effects the side tone on both rigs, at least I hope they
> might be the same dealing with this problem.  73, Jim WA6EKS
>
>
>