I don't know if it can be considered as a bug or a feature request.
When having two pistols of the same type, we can switch weapon to one pistol, but the problem is that the one in the right hand is always selected.
There is no way to select the other one, except by using the drop weapon function.
It is particularly annoying when the one in the right hand is short of ammo, and when we want to use the second one.
Maybe, we can autoselect the pistol which have the most of ammo.
And, in single pistol mode, maybe we can switch to the other one, if we change weapon to single pistol, one more time.
Any other ideas ? Anyway, this is something that can be corrected, shortly