Yes, they have been doing the "super doubles" for the last several weeks that I have been in there. I have been wondering about it myself. When I asked an employee, they said as long as the sign is up, they are still doing it. Do you think they're trying to compete with GE? I think it's wonderful and I hope they don't stop!!
The 4 like coupon limit is correct as far as I understand. I haven't verified this lately, but it was the case a while back. I don't imagine it's changed.