Question about redeeming points on the All Access card.

I was just going through a receipt from a few days ago and see that the restaurant only deducted enough points to cover the meal...but not the taxes. I calculated the tip based on the pre-tax amount (like I always do) but now I'm wondering if I should have added another couple of bucks to cover the taxes.

Any insight on this? When redeeming points on the card, does it only cover pre-tax amount? Was I supposed to cover this? Or did the restaurant mess up?