In relation to the website I've just realised that if we choose an accommodation option that we can't select it as a point to navigate to.

Similarly, I can add a specific address to navigate to either within a route or as a new destination, but not as a (new) start point?

In the same vein I can go 'via' a Marker but not start/end at it (within a route). 

I'm not familiar enough with the App to say whether the situation is the same. 

It's no big deal but it may be something for the never-ending to-do list :-)