maybe it came from 2 different pairs...i have this same problem with my Multi Blue Satin Armadillos.
when i received my order, the right shoe was dirty. so i ordered a 2nd pair (supposedly the last pair in the company) - this time the left shoe was dirty! so i ended up keeping the left of 1 pair, and the right of the other, and returned the stained sides together.
weeks later, as i took pics from the back of the shoe, is when i noticed the difference. the heel heights are not equal, the pleating is off, and the pitch of the arches are different, even though both are the same size.
but i've loved this style for so long, and i got it at 2nd cut, so i decided to just keep it.
it probably has to do with each pair being handmade, so maybe each pair might have subtle differences...but the 2 sides of the original pair should match up. sorry, do i make sense?