BTDT when changing the route by using "Selection Tool" that was the reason I mentioned zooming in to make sure the route is where you want it be. This is one of the features that could be better in MS. You mentioned getting used to the time/distance to the waypoints couldn't you use "waypoints" to designate breaks? I know this isn't the same as S&T's, but it would at least tell you as you're riding how long it's going to take to get to that waypoint (break). 
Have no idea why MS was directing you down an unpaved road, but would suggest (if one so desires) when you run into that type thing to report it to NAVTEQ (creators of mapping data). With the constant changing (addition, deletion, closing) of roads these things will happen.

Ride Safe,
Fired00d

I noticed the "u-turn" problem re:waypoints after the first time I routed a trip. Now I zoom in - no problem.
I did use waypoints as break stops, but then a Sporty showed up on that ride so we stopped for gas more than planned. No big deal. Should work ok.
Will report those dirt roads to NAVTEQ. One south of Dublin, Ga was a real surprise - was already on US 1 north of Baxley as I recall & it lead to Dublin, but the Zumo tried to send us down an unpaved pig trail.

I was leading, did not turn of course, and later on the group did not even remember the road but recalled me slowing down then zooming off.

Overall I am VERY happy with the Zumo. Has saved me MANY gallon of gas (miles) in the car & made the bike trips a lot easier than they used to be. As with most things, we gripe about the 2-3% of the thing that doesn't work as well while taking the other 98% for granted. Human nature.
BTW - most all my riding buddies with Tom-toms, & other Garmin GPS devices mostly prefer the Zumo since it is much more user friendly.