You might find yourself accidentally adding two orders to cart. Or there's an order for our Annual subscription, while you want to be billed monthly.
In these cases, please clear your cache and re-order the plan you need with a fresh browser. It should resolve the issue.
For instructions on how to clear your cache in Chrome, Firefox, IE, Safari and others, please see this external link: https://www.lifewire.com/how-to-clear-cache-2617980