I guess Paypal doesn't trust me, which is odd since I've done hundreds of transactions with them over 9 years, and have had thi - well might be better for others to their bank account if they cant afford to not have the money available straight away (such as steam sales), just incase they run into my issues.
Also never bulk buy! you have to refund everything you bought in that cart and rebuy the shiz you liked -_-