I've been searching for a while in RNG Reporter's Time Finder tab. I'm searching for a 31/31/30/30/30/30 for Egg IVs with Parent A being 31/31/31/31/31/31. Is it because there is no spread for that or have I not found it?
There is, try switching the days/month/year around, also from my experience helps if one of the parents has a 30 - but not necerssary.