Just contact support and see what the problem could be. However, I will advise you that you do not get money deposited after each purchase into your Paypal account anyway. There is a minimum payout value you must set (let's say $25 US for example). Each sale you make accumulates on CGT until that minimum payout value is achieved, then payouts are made once a month to your account. So let's say you accumulated $100 in sales by the end of the month, then you will be paid out that amount (minus the CGT fee) on the 20th of the following month. Payments are for the previous month, just like at a real job when you get paid for the previous week or two of work.
Still, contact support to find out if your payout agreement needs updating.