I had to make 125 or so mackerel fillets. I gathered 302 mackerel and went to confectioner shop. I hit max amount and it correctly added the 302 fish to fillet.. the problem is, the machine greys out the "create" button. Took me a few minutes to find out, that if I lowered the amount to 300 mackerel, the create button lit back up. So the table seems to be limiting the amount created to 150 fillet (300 fish) and not allowing all fish in inventory to be used at once, though it shows them all when you hit max.