so if you log in to developer.apple.com and click the Account tab, you see the missing team under your name? But in Xcode's Settings, you don't see that team under your account? That does sound frustrating. It has never happened to me, so I can't help directly. There is a link to Membership and Account help here: https://developer.apple.com/contact/topic/select good luck!
Topic:
Code Signing
SubTopic:
Certificates, Identifiers & Profiles
Tags: