Etsy under calculating international shipping rates.

Anyone else notice Etsy severely under calculates shipping rates? Just fulfilled an order to Australia from Canada, they chose Xpresspost. Etsy charged them $82, but the actual rate is $110. This seems to be the case a lot of the time. The only time they get it right are shipments within Canada. I often have to say my products are heavier than they actually are just to get an accurate shipping calculation. I wonder if this is another Etsy ploy to make things cheaper for buyers. It’s annoying as hell and they clearly aren’t taking direct quotes from Canada Post.