Why were the dead buried in the floor?

Skeletons were buried in a fetal position, many under raised platforms, which the archaeologists believe were covered with reed mats and used as beds.
"While people talk of the 'houses' of Çatalhöyük, they can equally be talked of as tombs.
People lived their lives walking, eating, and sleeping on the bones of their dead ancestors."
Will
this burial practice seem unusual 9,000 years from now?