KL have codeshares on two railroutes that I can see:
NS AMS to RTM (e.g. KL241)
Thalys AMS to ZYZ (Antwerp train station - e.g. KL2661)

If you book something like LCY-AMS-RTM will you earn FB miles on the AMS-RTM segment (500 for domestic + 1 segment)? If so are miles supposed to be credited automatically?

The Thalys should be the international 750 miles from what I understand. Anyone had any problems claiming these miles?