Print Management / AIF

I have setup the AIF so that when an invoice is created, it gets added to the queue. I know that this doesn’t work when Printing to Screen. So I had adjusted the print management settings for that customer to Print to Archive. However, the document still doesn’t get added to the AIF queue.

After some investigation, I’ve found out why. Even though I have “Use Print Management” ticked in the Posting box for posting an Invoice, Under the Printer Setup I have “Send To” set to screen still, when I change this to Print Archive my document gets added to the AIF queue.

So my question is, why is this the case? Why doesn’t it pick up what I have set in Print Management for that customer?