Moves that boost all 5 main stats (attack, defense, special attack, special defense and speed) such as Ancient Power, Silver Wind and Ominous Wind, boost the stats before doing the damage. This means that if you get the first boost (±0 --> +1) you will be doing damage as if you were +1 Special Attack.

Hi there, can confirm!

Moves that use the "RaiseStats" move effect (anything that omniboosts) appear to be doing so before the damage calculation is completed, so they erroneously do more damage than they should. This does not seem to impact moves that increase stats that aren't omniboosts (e.g: Power-up Punch).

Moving to internal to be fixed, thanks!