Nope, wrong brackets - I can make tiny changes having direct and obvious calculable differences. For sake of example, if my refund is currently $100 and I enter $100 in 1099 INT, then my refund drops to $72. Subtract that out and it's 28% which is the old bracket. It should be 0.24. For MFJ, it's .24 then jumps to .32 - I'm nowhere near hitting beginning of .32 (I'm familiar with marginal taxes). Every additional (regular income) dollar should be all .24.
If you look there are a fair number of threads about people noticing the same thing.
