Just had a much closer look at the pictures, and it looks to me as if, the front bodice is much shorter than the back bodice and that is giving the illusion of the hi-lo skirt.
In the first pic, the bodice looks much too short for the model, but the second pic it looks really nice.
I'm sure if you didn't like the hi-lo, you could level it all up. I like it though.
Jessie