What is going on with Canada Post?

[Coast Watcher]

So far this year I have 7 INR Item Not Received disputes from buyers in Canada for badges sold on ebay. This is usually after 3-4weeks. Apart from the most recent item ( in which paypal have frozen the proceeds ) the items do get delivered eventually.
The most recent item was sent 5 weeks ago to a fellow forum member. I have offered to refund their payment after explaining that mail is taking that long for some reason. The problem is I refund the payment and next week the badge turns up.
Any forum members work for Canada Post that can offer any insight to the delays?
Ed