Since we've upgraded to FetchApp 3.0, we've seen huge improvements in speed, performance, and reliability of FetchApp. As with many software migrations, a few issues have cropped up that we're actively addressing. Due to the high ticket volume, we are having trouble answering everyone individually in a timely manner, but we are actively working on the following known issues:
We have actually added a feature that will allow you to stop validating PayPal pricing if you're overloaded with emails.
In your FetchApp account, on the carts page, scroll down to the PayPal section. You'll now see the following option:
If you would like to stop all PayPal notifications, please set this to "Do NOT validate prices". This will tell FetchApp not to notify you when a product price in an order differs between FetchApp and PayPal. We are also working on updating the Ruby code to make the price verification more accurate.