same situation here. I see really high numbers, maybe 5-10x as much as actual feedback I received.
I was nervously looking around if something gets lost, but I could not find anything.
my guess is that Apple counts this incorrectly somehow, but I do not know.
I just started using this, have a small app with just 12 testers,and I get the same issue.
One tester who installed 36 hours ago (including two sleeps) already has 22 "feedbacks". But I have recieved none in email.