Boss painted

Check this out guys. After 16 months of body prep and engine and front end rebuilding by 70 Boss 302 was ready for paint. Decided to go basecoat/clear. Since it's a sold color (grabber yellow) I painted it disassembled. I first bought 1& 1/2 gallons of paint and did the inside and under the hood and fenders and on top of the hood and trunk. Looked like I was not going to have enough paint left so I bought 1/2 gal more and mixed it with what I had left. I painted the rest of the Boss. One of the best paint jobs I ever did, smooth as glass but here's the catcher. I reassemble the car and the colors don't match. In the sun the hood is a beautiful grabber yellow and the rest of the car looks like a not quite ripe banana. Really looks like CRAP. I've decided to re-paint but I haven't talked to the paint store. Don't know quite what to say. I don't feel it was my fault but I should have known better than to mix paint. $400 down the drain plus all the prep work again.
What do you guys suggest? Hopefully someone can learn from this.
Dave