(I deleted my previous post and created this one, because I can greatly simplify the bug report).
Say you're on Ave A, and want to navigate to Bob's Business, also on Ave A:
1.7 miles down Ave A
(Arrive at destination)
When you put in the address for Bob's Business, and select it, you get the confirmation screen, with the possibilities [Close] [Routes] [Go] and an estimate in large print of how many minutes and miles this is.
On this particular screen, it seems that the distance you must travel NEVER takes into account the first segment of the trip you must take - the one your car is already on. In other words, that screen will say this:
Bob's Business, 125 A Ave
5 min 0 ft
Once you DO press [Go], THEN the navigation display at the bottom correctly displays 1.7 miles to go and 5 minutes travel time.
In the most general case, I think I can say this:
If navigating to a destination, the first screen estimate shows the proper number of minutes to your destination, but shows 'the total distance there minus the first segment of your trip'. In a case where I asked to navigate 2.2 miles total (one half mile past the first segment), I would be told that my trip would be:
7 min 0.5 mi
AM in SW Shasta, NW Tehama, Central Trinity Counties, CA; Mt Rainier Nat'l Park, WA