So I will be the first to admin I'm not super well versed in DnD rulesets, and definitely not 5e, but shouldn't Rogue sneak attack be Weapon Damage + dex mod + 1d6 for every 2 levels starting at level 1, giving my level 4 Thief +2d6 additional damage with sneak attacks? My damage is still only rolling 1d6 bonus damage on sneak attacks, at least according to my tooltip. Am I wrong about the additional dice?