Garmin 590 Issues - Help Needed

[Studley Ramrod]

I have a love hate relationship with satnavs.  Lovely when they work properly but immensely annoying when they do things like recalculating route for no reason, or take you through a city centre as it's 0.2 miles shorter than the countryside route.  I often forget which method I've selected, shortest or quickest and that's when I end up going through Leeds city centre at rush hour after hitting the Home button in Pateley Bridge.  I wanted to go down the A1 FFS !