multiple addresses - changed address means no added invite for either?

[ Redacted lead-in for a different issue I was thinking of that involved personal and professional personas with non-linked keys, which can be reduced to this issue. ]

Account #1 - Personal Professional (aka user@email) - key = user@email
Account #2 - Corporate Professional (aka user@work) - key = user@work, user@prevWork, user@prevPrevWork

If an invite goes to user@work, and it is accepted and a nice vanity URL is created with the keys for user@email, then after a bit one decides to change the address for the vanity to user@email (this wasn't immediately possible to do). Now, to set up a new nice vanity like

keybase.io/userAtWork

a second invitation is needed. But now both addresses appear to be "previously invited".

What to do?

No files, tests, or entry points are named, so begin by tracing the invitation, vanity-URL, and address-change flow described in the report. The issue needs an agreed expected treatment for changed and previously invited addresses before implementation can be considered complete.

Written by the indexing model from the issue text.