Good catch, it seems your evidence based post shows PSA/DNA doesn't perform the service they claim they are performing here. Their statement from the PSA website is not accurate:
And their claim of an "autograph authentication process"?
So if there were no exemplars for the SCP Choynski how could there be an "autograph authentication process"? Where is the integrity in that?
Was this a gift authentication with absolutely no knowledge of the subject's autograph or handwriting?