The numbers on my DBC3192H are for one pint. I suspect these numbers are grams of each ingredient, but I didn't ask, so thats a guess. It could be ml or something else. Is your formula for one quart? I'm also puzzled why there are two sets of values next to each ingredient.

The shop I buy paint from has a large sign saying "no return on paints". So it will depend on policy and promises made at your store. I would think they will work with you to improve the match to suit your expectations. The problem will be bringing an example for them to match. It may also be worth a test spray over black primer.

I had a chance today to see PPG base/clear "Torch Red" on a 56 BelAir. Most of the show cars had noticable orange peel. This car had been extensively color sanded and it looked awesome. I'm now leaning towards bc/cc. I need to see how single stage sprays out though.