Somewhat recently (maybe one or two months ago), I noticed all of our shipping rates began to differ from what the customer’s had actually paid for. More often than not, we were paying a bunch more for shipping than what the customer paid. This is no good!
I found a setting that allowed you to set a default package size to be used for when calculating shipping at checkout. This had somehow gotten set as a business size envelope, so shipping rates for a 5lb order was laughably low compared to the ~$20 (or more) that it should have been charging the customer.
So I adjusted that setting to use one of the boxes we typically ship products in. This helped, but now shipping charges for small items that would normally fit in an envelope are artificially high.
Shipping used to be pretty much dead on, what the hell happened, Shopify?? You’re killing my profit margin!