deduplicate (fedex) shipments

I have an online store I frequently order from, and for whatever reason I often (... or perhaps always? haven't double checked) end up with duplicates of my order tracked in the Aftership app.  From inspecting the latest such occurrence, this seems to be because the tracking number the seller gets and shares with me in their emails differs from the tracking numbers in my Fedex Delivery Manager notifications.  However, the tracking numbers clearly lead to information about the same package, so ideally the app would be smart enough to realize that and deduplicate them.