No hate, I was just messing with nckmabry. There are SEVERAL different versions of FKS and Pivots and pretty much ALL of the are compatible together, cause they're the same thing with a different name. As long as they say either FKS, FKX, or Pivot on both pieces (in any combination) it'll work, I've seen people riding one toe piece thats and FKS the other toe piece is a Pivot and both heel pieces are FKS, it's all good. The BIG thing to look out for it the matching DIN (I'm pretty sure they can a few numbers off, like a Pivot 14 toe can work with an FKS 155 heel) but it gets kinda sketchy when your matching an FKS 120 toe with a Pivot 18 heel, you know.
I think you're in the clear - if you want more certainty try and get pictures and posting them here and we'll be able to tell you if the combo works or not, but most likely it works cause they're all pretty compatible and the person selling them probably rode them that way.