title: Woocommerce Proceed Checkout even sold out or 0 stock
body: <p>Woocommerce Plugin,</p>
  <p>Why this things happened? We have only 5 stocks in one of our product. The total ordered that we received is 9 and all of this 9 orders are paid. We have -4 in stock and we don’t know why this is happening. Please help us.</p>
  <p>Thank you in advance.</p>