How much atf is needed for a drain and refill on my truck?

I have a 2016 4x2 2TR-FE 4cyl. AC60E Transmission.

I downloaded instructions on doing a tranny drain and fill and the instructions say to use 1.6 qts. When I filled it cold I drained around 1 qt cold out of the tranny but it took 3.2-3.3 qts before it started coming out of the overflow plug. I then got it to temp by jumping the OBD ports and drained the expanded fluid from the overflow plug.

Should I do it again but just use 1.6 qts this time as the manual says to do? I don’t get why this says to only fill 1.6 qts when the pan clearly holds more fluid.