If you want to be charged for 12-months, you need to change your payment details to "Pay on Invoice" or "Bank Transfer". You payment should be set to manual payment first so that in the recurring payment you can select the "Pay for 12 months..." option.
-Open shop in SF
-Click My Orders
-Go to Settings Menu/Tab
-Select Payment Details
-Choose "Pay on Invoice" or "Bank Transfer"
-Click "Submit" button