Walgreens: $10 Register Rewards when you buy Zyrtec?

I just wanted to share this email I received from Melanie.  If you need this product, this seems like a good deal:

I just wanted to pass along a bargain I got at Walgreens today. The Zyrtec 40-45 ct is on sale $26.99 with a $7 RR. Well, I bought mine using a $6 off coupon from the mfg website, and I got a $10 RR! I don’t know why it was $10 instead of $7, but I tried two transactions and I got $10 both times. Makes the final price $10.99.

Has anybody tried buying this product and gotten the same result as Melanie?