I'm going to assume they have industry coded, to check if that machine can actually make the item, before it starts a new batch. JC said the machines will keep running till it finishes, so it shouldn't just run forever.
If, the machines do end up starting new batches without the schematics or higher tier machines, I'd consider that a massive problem, that would merit them immediately shutting the server down to fix, like that time they made changed to how industry machines do batching, and it caused some really weird and high numbers of items trying to be made, for maybe 10 minutes, before NQ shut the server down to fix.