Ivan,
If first time your FPs were unclassifiable, they should send you a second FP notice. If the second time FPs are unclassifiable, then third FP notice is rarely sent and instead they transfer to local office. So if your FPs were unclassifiable for the second time, too, then they might ask you to bring police clearance certificates from places of your residence during last 5 (?) years.
NIW is acronym for national interest waiver, where labor certification is waived in national interest.
RIR stands for reduction in recruitment, where labor certification is faster.
Best wishes,
Jigesh