I think you’re right. I wonder if there’s confusion between only being able to order 20 round boxes and only being being able to order 20 boxes?
Regardless it does seem like a supply issue.
Yeah I used to see this kind of thing more than once both when I was in law enforcement and buying for an agency and later when I was working as a rep for an ammo company among others. Ammo is a very, very tricky business with low profit margins and difficult as far as getting production and material intake right for supply and demand. Just guessing but the massive, relatively sudden shift away from .40 to 9mm by law enforcement nationwide may have them scrambling to catch up.