Trad IRA / MAGI / Numbers go up

I was trying on my married filing jointly returned to put 2500 into a trad IRA to lower my tax burden.

 

Then I advanced 2 or 3 screens after entering 2500 as a traditional IRA and presto!  My numbers went UP from 1003/571 to 1803/772 instead of down!

 

Can someone explain this MAGI for me?

 

And will buying a trad IRA for my husband lower our tax burden?  He only made 30k this year.

 

See attached screenshots!

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