No, that's the photo you're working on now. I want the ones you've already printed - the ones you're comparing to verify your calibration.
Jpeg files will do - they don't even need to be very big, you can reduce them in size.
Yes, that's right. Your focal plane looks pretty much perfect, and there's no motion blur. I think you did everything exactly right, within the capabilities of your camera in that light.
Don't attempt to print this one until you've taken the Sharpening Class.
Actually, I think that method will work ok. However, do you think your client is expecting some cloud detail in the sky? If so, it's going to be much harder.
The reason it works (and yours won't ) is that the background is so blurred, and so "uncluttered", if you know what I mean.
Your background has so much going on, and can't be blurred artificially, I'm afraid.
What I mean is, your file is perfectly neutral. Absolutely no magenta at all. So the problem is with their print process.
Hopefully they have advice for you about what to change in your file to prevent this. But DON'T let them make you pay for the print again. This is a problem with their print process, not your editing process.