When doing a joint return, why when I split pension income with my spouse did it add that amount to my income, but not deduct it from his?

It asked me how much pension I wanted to split and I put in $15,000.  It added that to my income (the lower income) but didn't deduct it from my husband's, so now our total income is higher!

Seniors and students

The deduction on his return happens after the total income line. To see this, click on the review tab and select Bottom line tax summaries. On this page, click Detailed tax summary. When you scroll down, you can see the deduction at line 210.