I'm not really sure what mistake I'd report? That Maps / Navigation give conflicting primary routes?
But that's less a mistake and more that they haven't bothered to implement traffic awareness into the Maps route selection thing, so would be a feature request (as would the advanced traffic awareness thing).
They oddly updating streetview right outside my house recently. A few images down the road and it's 2009 and up the other end it's 2011. No idea why they didn't do the whole road, the old photos are pretty dark and grim, which to be honest is more representative of the weather round here!