Did you finally solve the puzzle? If you did, I would really appreciate it if you could share your understanding.
I am having the same puzzle now: I am in the 22% tax bracket (the number is far away from the either end of the bracket), but I (hypothetically) increase or decrease ordinary income of $1000, I would increase or decrease the tax by $270 (instead of expected $220). I still do not understand why the marginal tax rate (27%) is (much) higher than tax bracket (22%). Thanks!
