This can be ignored, there was some confusion because I was double checking the calculation using TurboTax's brackets here: https://turbotax.intuit.com/tax-tools/calculators/tax-bracket/
They incorrectly show the 10% bracket for married filing jointly as being from $0 to $23,300. It should be $23,200, which is exactly double the single filer bracket. With that being the case, the IRS tables I mentioned above are correct.
