I had a bit of aggravation at my cvs this morning. The cashier kept insisting that I couldn't use a $3/$15 coupon with my ecb's. She would read the fine print on the $3/$15 coupon and point out that it says "Cannot be combined with any other CVS/pharmacy coupons". But, she didn't have a problem combining it with the $5/2 Duracell
CVS coupon I used or the $1 off 2 Propel
CVS coupon I used. She was only concerned with combining it with my ECB's.

I told her I had combined that coupon with my ECB's dozens of times and had never had a problem. She insisted that each of those cashiers(and managers and shift supervisors) that had waited on me were all wrong. I wasn't satisfied with that. So, I asked to speak to a manager. Fortunately, she was only standing a few feet away. The cashier called her over and the manager scanned the coupon and walked away. The cashier said that the manager can do that, but that she can't. And then she insisted that she has never taken a x/xx coupon and ecb in the same transaction. Which is BS. She has waited on me before and has definitely done so and never questioned it before.
I would really have liked a clear explanation of why an ECB is considered a coupon, but a CVS coupon is not considered a coupon in this case. But, both the cashier and manager are really quite clueless. I guess I'll be contacting corporate for an explanation. In the meantime, I'll just avoid this cashier.
Anyway, there was one bright spot today. I received a $5 off any $15 purchase CRT.

It is only good for 3 days though.