You are actually getting the +1d6 each 2 levels above one for sneak. But instead of getting an extra d6 they just made 1d6*2 for level 3, which by the way still sucks, because it heavily changes the damage spread, making it much more extreme instead of more avarage, and It leaves such a sour taste when you roll a 1, before the chance of getting 2 on sneak was 1/36, now It is 1/6, the same is true for a 12, but still I'd Very much prefer if It rolled multiple dice.
+1
