Well, there's a chance it could be miscommunication. I was also supposed to go with a 90-day rX, but the CVS Caremark folks couldn't get in touch with my neurologist to confirm. So I get a big package every month that has a tiny prescription bottle in it... With my latest plan there's no difference in charge between the 90-day and the monthly rate, so there's no incentive for me to nag them about it. In your case, $50 is definitely worth making them get it right. I hope your doctor gets some answers for you.