Rarely will you see a diamond with an I1 clarity grade sold with a certificate. As I discussed in the Diamond Clarity article, it is no small matter that James Allen has decided to sell GIA certified I1 diamonds online. There are very few places that do this.
Intelligent companies in the industry never sell GIA certified I1 diamonds because they know they can sell them for more without the certificate (and therefore without using the Rapaport diamond price list as the baseline).
Whenever they receive an I1 clarity grade for a diamond which they had intended to receive an SI2, they will simply throw out the certificate and pretend it didn’t exist.