First, do you have the "Respect Planning Parameters" toggle checked when you are running your Plan?
I think another possibility is a date issue. The suggestion for 60 sounds like an emergency suggestion based on demand being in the past.
Finally, you don't need the Max Order Quantity of 3240 unless you are trying to restrict suggestions to 3240 per line. This would be typical in a batch manufacturing environment where you want to split a large quantity across multiple lines or dates.
If everything goes correctly, I would expect you to get a suggestion of two lines each for 3240, based on your current settings.
Hopefully something here helps identify the issue.
Best Regards,
Ben Baxter
Accent Software Inc