The ADR "ORDER NOW" button creates a new ADR order (or an Override) that will take the place of your automatic ADR order for the current month. For example, if you normally have a monthly ADR order ship on day 20 of each month, you may go online and place an "ORDER NOW" order (or an Override) on day 12 with different products, a different payment type, and a different shipping address, if you so desire. You will receive the same product discount and product points that you would normally, and your monthly shipment will simply be held until the next month.
If you would like to send out another ADR order in that same month, you can use the ORDER NOW (Override) button as many times as you would like. There are no limits placed on the "ORDER NOW" feature.