Actually, I was the one that was wrong, lol. I forgot that IVs are calculated by current frame +3, but I didn't take that into account when I calculated the slots. And, I know, RNG Reporter 9.81 lists them wrong.
Wow, that's a really nice spread. And, yeah, high delays are no problem. I set my range from 520 - 10000 (Eon Timer is amazingly helpful).
Kiebin is also had a similar problem as me, with the sweet scent advancing by a lot. And, for me, the high frame jump happened consistently, not rarely :(