See if a customer placed an a la carte order instead of a subscription order

Our customers are great but they don't always remember to log into their account then go to their subscription and THEN select their meals. Sometimes they just order from the menu page and place an ala carte order. It would be great to see if a customer had placed an ala carte order, so when we are closing meals, we don't select anything for their subscription (thus creating a duplicate order). With 300+ people ordering, I don't have time to scan all the orders to see who placed an ala carte order.