Just went in again today and used 2 more. I specifically asked the cashier if I could use 2 coupons and she said of course I'll just ring up 2 transactions. So far I've used 10 coupons! Thanks again OP for posting this.
I've used these also without any problems. I used 2 today to buy 2 sing-a-ma-jigs. The cashier just told me I would have to do 2 seperate transactions.