I don't know what your email said but it is possible that you have misread it. According tot he ebay help info, if you are shipping from the US (and meet some other requirements) you receive your money 3 days after delivery is confirmed.
If you use Paypal to print a shipping label for Canada Post or UPS and your payment has been held you are supposed to get reimbursed for shipping within 24 hours after printing the label. I'm not sure how it works in the U.S. so perhaps you received info that was for U.S. sellers using USPS.
http://pages.ebay.ca/help/pay/payment_hold.html