title: Paypal Transactions not showing up in Sandbox, but appearing in notifications
body: <p>I'm using the PHP-SDK to send REST requests to Paypal.</p>
  
  <p>My transactions seem to succeed, both accounts get notifications, the seller getting "Notification of payment received" and the buyer "Receipt for Your Payment to xxxxx's Test Store" respectively. Both accounts' balances change according to the transaction. Yet there are no transactions shown in the transactions tab.</p>
  
  <p>What's going on?</p>