(Endorphin)
I have a similar situation and always carry both of my passports. They are not supposed to give you hassle for no entry stamp though (i think).
Hi Endorphin,
I guess that means at your departure and arrival in Schiphol that you use your Dutch passport, and upon your arrival in the USA you present your US passport. Have you ever tried to depart by just giving your US passport? :?:
BTW...I just checked and I do have a dutch stamp in my passport, but it's from 8 years ago when I first entered. But in any case, if they hassle me, I can always produce my EU Identity card, which I carry in my wallet.
Thanks