awaiting payment orders

Hi there, we have a unique payment method for some orders on our Shopify store. When we manually mark orders as 'paid' we then have to manually select orders in Shipstaion's 'awaiting payment' and mark as paid. It would be much more efficient to our business if when we mark as paid in Shopify it would automatically mark those orders as paid in Shipstation. Therefore, orders would automatically end up in awaiting shipment and we could fulfill orders ASAP.