I feel there are a number of "modes", or, I don't know, "levels" maybe, that offer different features and are not intuitive (for me). I think a long time ago, you were either on the map, or you were in navigation, or you were in Street View. But now I get the impression that there's steps in between, like: you have maybe soft-selected a route, but you're not quite in navigation mode, yet you're unable to drop a pin somewhere else, so you have to go back without knowing how many steps exactly, that sort of funny business.