I was able to fix this by entering $0 for the "Tell Us the Value of All Your Traditional IRA Accounts" questions, which is not actually $0 because we have rollover IRAs from past 401(k)s.... After doing that, it recalculated and removed the taxable income for the IRA distributions. Immediately after that, I went back through the traditional IRA contribution forms and put the correct values for this question back, and it let me do it without adding the taxes back. This seems clearly buggy to me.
