The account is your CameraFTP account which you just logged on to. I believe you are asking why your account has a negative cash balance.
You had a first subscription, which was past due. Recently you ordered a second subscription. Please note ordering a new subscription is not the same as making a payment. The money is directly used by the new subscription. Thus your account still has a negative cash balance.
But your monthly billing date is different from your second order date. (Billing date is the day of the month when you signed up for a free account). Combining your account cash balance and service coupon balance, you don't need to make a payment until your next billing date.