My suggestion is to not get too wrapped around the axle about it. It is a thousand dollar bow, and you have every right to expect a bow built to your specs, but let the man fix his mistake. If, at that time, it doesn't meet your expectations, take it from there. 95% of the bowyers out there are absolutely stand up fellas and I am sure he will fix it, make you a new one, or refund your money.
That said, I am a bit confused as well by what you mean by "reversed tiller." Whether you shoot split or Apache style, five minutes of shooting a new bow isn't going to show up in a huge way. In reality, the apex of the bowstring when pulled back is still very nearly in the same spot, it is a very subtle difference.