As long as you have used the same doctor and pharmacy you shouldnt be in any trouble. I would discuss this with your doctor also and let him knoiw the pharmacy is doing this. As for your taper, make sure you are drinking plenty of fluids. You may feel increased pain for awhile too. This is rebound pain and it does subside. Many of us found our pain actually got better once we stopped the meds. Stay close to the forum as we are here to support you.
I just wanted to offer support in your attempt to tapering your pain medication. Due to the recent changes in the dispensing of short acting opiates, I , too, am considering tapering as well. I also wanted to tell you IMO I don't think you have done anything wrong thus you shouldn't be worried about that. Chronic pain pt's everywhere are realizing that their care is being dictated by no longer them and their PMP but rather government and insurance companies and it is shameful!! Good luck in tapering!!
I would try a different pharmacy and tell your doctor about it. See if your doctor can help u with a plan of tapering down. To help with the withdraws that u are going to have remember to eat and drink. if u feel like u can't eat a little at a time all day every few hours and drink water or gatorade. And keep posting u can get a lot of support on this site.