I have an idea!
When handing over your coupons, hand over a copy of the coupon policy and state that if they have any questions to how your using the coupons, they can reference the sheet. This might show that you are trying to make their job easier. These cashiers may have questions on their coupon policy but never asked or never got a straight answer so they make their own decisions when it comes to coupon users.

Also, to avoid future problems when checking out, hand the cashier or manager a copy of the policy in hopes that they will share it with the other employees, so that they are aware of the policy. This might help educate the employees so that they don't give us all such a hard time when we check out.
Someone has to educate these employees, why not be proactive and start doing it today! In the end, it will make our lives easier and everyone elses that shops with coupons.
I haven't done this yet but I will tonite when I go to get in on the Olay deal at Walgreens and my trip to Target!

I have tried this at Walmart when they wouldn't take a coupon of mine even though their policy states that they do. They respond with "that is just a guideline, our manager decides what coupons to take". Called corporate and they concurred with what the store said.
Try it though. Might work for you.

So is there any links or something that you can scan or email to me for CVS because I always have issues there.