I had just over 4000 dumplings when the event ended and in my Inbox I found one of each Ampy where it said "x5", which should be correct:

Apparently I'm not allowed to post links, but for anyone who wants to copy/paste: picster.at/img/1/a/f/1af30a7bc4f237dad147dbe9a2e7a86c.png

However, it seems I only actually received one of each Ampy.

Same as before: picster.at/img/a/b/f/abf3df51a4907fa64df93fb3a62097b1.png

Anyone else have this issue?