Re the double stops, what's easier is moving from a double stop on, say, the A and E string to one on the D and A string. The arc is smaller.

As far as rests go, the do exist in fiddle tunes, but aren't easy to find. Classical violinists have a habit of completely stopping the motion of the bow, or picking it up off the strings in between notes. It does NOT work well with fiddle tunes, IMO.

On the mistakes she heard vs the ones you heard - that may just be because you're two different people.