i think i see why you’re getting confused. When it says ‘scale sets the general time signature’ what it means is the lower half of time signature.
so for example -
if you had 6 steps in one track and 8 steps in another and the scale was set to 1/1
then you would have 6/8 and 8/8 playing together (assuming you put some emphasis on the downbeat)
but if you set the scale to 1/2
you would have 3/4 and 4/4 feel wise (though with the emphasis left in it would sound like half speed)