Outlander Wardrobe and language

[jhockin]

I'm curious about how the kilts are worn. It seems to me that many, if not all, are worn at "jeans waist" instead at the natural waist, where kilts are traditionally worn, and, if I'm not mistaken, historically speaking, all mens "lower" garments, including pants, were worn, until relatively recently ( say, since about 1960?).
Was this a consciously made decision?

I also noticed, in episode 5, that "Black Jack", while flogging Jamie, appears to be wearing pants that are at "jeans waist" level. Again, is this "historically correct", or an adaptation?