That's odd; on my computer post 3 is the UBR report for Feb '17; but, my bad on the "264" -- I guess the "perfect score" language sent me down the wrong rabbit trail.
I'm pretty sure that the match at post 13 was sanctioned (even the UBR website implies that it was); I don't know why the results aren't on the UBR website -- someone must have dropped the ball. But, knowing Bill Dittman, I doubt that he cares whether his target is "officially" recognized.
RE: your edit # 2, I think they're sanctioned unless noted otherwise.