Resellers and breeders are not the same thing, and with feminized seeds the difference shows in the packaging. A sealed breeder pack carries the original batch details, while seeds sold singly from a reseller's own vials have been opened, split and relabelled somewhere along the way. The accountability section of https://queenfeminizedseeds.com describes results published against a lot number carried on each pack, which only works when the pack stays intact. Repacked singles are not automatically bad, but you are trusting one more pair of hands with the label.