Could be a local guy put a bunch in this year that he said they was useless .
Your hive sounds somewhat like mine. This was a new package with mated queen that I installed around April 24. A week later there was some, but not a lot of capped brood. Around May 20 there was NO worker capped brood but tons of capped Drone brood. I thought I had a laying worker hive, and no queen, so I had figured on a shake-out which I had planned on doing next week. 2 days ago I took a look just to confirm that a shake-out was the ticket. I saw a few remaining unhatched capped drone brood, no other open or capped brood, and SURPRISE a big fat queen.\I have a hive that's been a bit of a problem this spring. It was doing well till the lid blew off of it in a storm in Feb. I think this killed the queen and much of the brood. On April 13 I added a frame of brood and eggs. No signs of a queen so on May 7 I introduced a marked queen. On May 21 I took a look and saw an UNMARKED queen (presumably the marked one was killed) but no brood. Today (June 1) I decided to combine the hive with a swarm I'd caught recently. I went thru the hive beforehand and found the unmarked queen, but still no brood, larvae, or eggs (at least as far as I could see). The queen looked fine.
I took the frame with her on it and another frame of bees and put it into a nuc before combining the two hives. Is it possible that she's simply infertile? It's been six weeks since I introduced the frame of eggs, so two weeks after she should be laying. Weather has been fine so I doubt that she was delayed in her mating flights.