Found on the Steam forums:
It seems they added on Hide Armor for +4 AC (the core Mite from the SRD is unarmored), then it gets additional +2 from custom difficulty. The final +3 from Dex (which should be +1 as per raw) is either a bug or much more likely the result of another difficulty setting, increasing all monster attributes by +2 (which would then affect all derived stats such as AC, Saves, BaB, DCs etc)
As
Serus mentioned the game doesn't seem to have a core PF difficulty for some reason, so I strongly suggest just play on 'normal' for now, and avoid toggling on any other difficulty settings/sliders. The +0.8 damage won't deviate much from core PF, even on Crits.
Done, did my Codexian duty and bought it. I.....might have time to play it on the week-end...I hope...maybe...
Any recommendations on what fun class to play as a Pathfinder newbie?
Grunker Andhaira?
Wizard definitely. If you don't like casters don't have issues with Alignment then go with Paladin. For pure fighter types you have options between Fighter, Ranger, Barbarian & Rogue (you can multiclass among these for fun builds). The game also has archtypes though, which adds more choice and tinkering. Magus is one of my favorite classes in PF, but not a good one for someone new to PF.
Note there are two ways to play Warrior-Mages: Either straight Magus (without Archtype even as the base Magus is superior IMO to any archtype available in this game) or Fighter 1/ Wizard 9/ Eldritch Knight 10. The second option will grant you all the highest level spells in addition to being competent in melee. (though Magus wins in the coolness dept)