The IRS has dramatically changed the 1040 for 2018. What you are seeing is just the new 1040. It is in multiple pieces and has a couple of "schedules." I think the new tax law tried to pretend that things were simpler then they actually are and this was a side-effect. This PDF draft on the IRS shows exactly what you are describing.
https://www.irs.gov/pub/irs-dft/f1040--dft.pdf
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