Are you sure u are “selecting” correctly? Clicking on a layout is not selecting its only for preview. You need to “x” it to really force to the layout u want.
You could also try hiding elements u dont need
Btw it could also be the pixel complication doesnt support that specific layout. When u first choose a complication type it allows multiple layout for different complication, and its up to the complication to decide which in the list it supports. (Make sense?)