[vachina]

I’ve got one cool story to tell. One of my Facebook alt credentials is somehow “merged” with another alt that I used to use, that is, I can use the email of one account to login to another account. The merge seems to be persistent.

Meta somehow determined the two accounts are the same person.

[sunnybeetroot]

This is normal. If you have one Instagram account, you can create another with the existing accounts email.