...
2nd bit of Apple info:
Go to Apple's main website.
Click on support.
Then search for: HT5582
Note: "Order of iTunes billing methods When making purchases, content credits are used first, followed by Gift Certificate, iTunes Card, or Allowance Account credits; your credit card or PayPal account is then charged for any remaining balance."
NOW, on Monday my iTunes Match is supposed to renew automatically. If it does and does not take from the credit on my account, I will be a very frustrated Apple users, and will most certainly alert you all to be helpful. If I don't update again, it's because it actually worked the way it should.
Pay it forward when you find out for certain answers folks. We only have each other on these forums.
Cheers,
C