How to (re)use POIs in planning after splitting route

[No6671]

Hi.

Ich just planned my next Route des Grandes Alpes tour. This time I'd like to use some of my POI like Passknacker.

1. I made a complete route. From Thonon-les-Baines to Nice.
2. Then I marked all my POIs along that route.
3. After that, I splittet the route into several parts. For that I took the original (00 RDGA), copied it and deleted the unnecessary points.

Problem one:
Sometimes HERE calculates wired routes. Especially in cities. So I used TomTom. And sometimes I used HERE. Maybe my problem comes from this circumstance?

Problem two:
My POIs show up on my splittet routes, but I cannot reactivate them. If I click on them, a box opens, where I can rename it, trash it. But not the usual stuff with color, pictogram etc. So I made a new stop nearby the POI. Is it possible to use those POIs again somehow?

thanks