Misleading Tips in Boston

Just an FYI, I was recently at a restaurant in the Boston area (Quincy to be specific) and noticed something interesting on the receipt. I calculated my tip mentally (20%) and then filled in the tip line on the receipt. As I was doing so I saw they had auto-calculated suggested tips at the bottom (20, 22, 25% etc).

I was shocked to realize I had calculated the tip wrong!! I looked again, nope I was right. Actually all of those auto-calculated tips overstated the dollar amount by about 5% (ie the calculation for 20% was actually about 25%). Just a scummy thing to be on the lookout for.