Phil Space,
I can assure you than AMS/MNL/AMS are direct flights, I flew the route myself during July of this year, the aircraft are B777's painted in a shade of blue and with 'KLM' written on them!!!
NWI/AMS return flights are currently available from £119.25, I've just checked on KLM's website, however if booking via a certain top cashback site there is currently £10.00 cashback if booking direct to KLM's website, infact currently £10.10 cashback, that brings the fare down to £109.15.
BUT ..... do you really believe the majority of travellers on KLM's NWI route are, final, destination AMS? Of course they aren't, that KLM flight will also be on an AF flight number, thru connections AMS/CDG, these are worldwide travellers that value their worldwide availability via the Fokker serving their little regional airport.