I've just tried this and it's not giving max HP for first level. Hitpoints are consistently 2 short for fighters and paladins and 1 short for wizards.
It's fixed this time.
Working on making sure stats don't exceed 20. This rarely happens, but at higher levels it could happen.
The Barbarian's stats can reach 24 in some cases, and appropriate magic items can increase the stat maximum by +2, so a Barbarian could legitimately have a stat of 26. And that's not considering the epic boons.
I could be wrong, but I don't think your primary stats can exceed 20. The PHB, pg. 15, states,"You can't increase an ability score over 20." With magic you could exceed 20, but not by normal means.