However since switching I've noticed some low dmg rolls. Earlier today I was getting 6s against gibberlings and gnolls. I have goblinoids and monsterous humanoids as racial enemy and I think they both fall into one of these two categories, if I'm not mistaken? This is my char sheet atm:

That being the case I'm not sure how I can be getting 6s against favored enemies.
Edit: Also I don't know why my char sheet reckons my Dmg as 1-8+6. I work it out as 1-8+5 (+3 mighty, +2 piercing). Using unenchanted arrows. The racial dmg should then be another +3, unless they have piercing DR, right?