Pretty much useless trying to request different button stances these days. From their Facebook wall (typos left intact):
stance is primarily dictated by the length of the jacket and we found
customer's expectation of requesting it to be lowered or raised couldn't
be fulfilled accurately. The best way to lower/raise the button stance
is to change from a two button to
a one button jacket, or vice versa. You can get a good idea of how this
effects the look by playing with these customizations here: http://www.indochino.com/Suits/personalization
I was also warned of the same thing when attempting to request a lower button stance on my Navy Cotton Suit remake. I wanted a lower button stance because: 1) Indochino is known for their slightly high button stances in general on their two-button suits; 2) I needed the remade jacket to be longer in length, and if they don't lower the button stance accordingly, the button stance will look even higher in relation.
Naturally, I was declined, but we'll see how my remake turns out.