YABU because you clearly don't know the rules around prescribing laws. To blame your GP, when he is only following the rules is awful!
I have a number of "controlled drugs" on repeat prescription, and I cannot order them a week in advance or more, it's literally 3 days before I run out, I phone my surgery, they deliver the prescription to my regular pharmacy and I pick it up from there.
On occasion when my prescription has not been sent over, the pharmacy cannot give me anything until they have the prescription physically in their hands, and they know my regular meds and when they're due!
I've only ordered "double" once, when I was going to a destination wedding, and would run out whilst I was away. The doctor knew about my trip, as I needed some sleeping pills just incase, but like you, I was physically given 2 sets of prescriptions to sign...
It really didn't bother me, so I don't understand why you're making a fuss tbh.