I have unfortunately found myself in the same situation, but with 10+ NUC's with the N2820 CPU and the same wrong Corsair 1333MHz RAM.. It has been out of share luck that my previously ordered NUC's have the correct RAM, and shows that changing a different supplier can indeed yield older NUC revisions (with different hardware) I.E H22962-102 instead of H22962-103. And there is no way of truly knowing what NUC revision your supplier is going to send, unless you physically go in and check the boxes yourself.
My mistake was to also put my trust in the DN2820FYKH brochure/brief and website, in which it specifies that 1333MHz is valid for the model, to which I erroneously assumed it meant all computer revisions under that title...!!!
Mini PC - Intel® NUC Kit DN2820FYKH
Anyway please Intel, don't keep the same name in a product where the hardware support is different in a per revision basis. I confuses and costs the customers (I'm not the only one as I can see), confuses and annoys the suppliers and probably gets you more support tickets you don't need!
A DN2830FYKH NUC should not be called a DN2820FYKH NUC!! But apparently they're the same..
Lesson learnt, it's logical - order the RAM after you know the NUC(s) version before you receive the NUC...
David