This could be good news. Or, they could have had low estimates for initial sales, and a slow production capacity. That could mean they didn't have huge stockpiles even starting from September. they could run out and even with relatively modest additional demand they may struggle to catch up.
Hope not though.
We know they had more than 7k ready to go immediately since that's how many they're giving away to KS backers and those ship in March. There are still a large number of regular preorders going out then too, so they had quite a lot of them built.