As I recall, Rhong Thiam was previously part of the Penang chain of Malaysian restaurants and is still co-owned by the Penang owners. It has been a while since I dined there, but I believe there are some holdovers from the Penang menu, so this may explain the noodles. However, Rhong Thiam is definitely a (very good) Thai restaurant, and the chef and other co-owner, Andy Yang, is from Bangkok.