Missing Characters

Logged in today and only 1 (most recent) of my 3 characters show up. Says 1/6 characters. What happened to my other 2??

One of three things is most likely the issue:

1. You have two or more accounts and they are in a different one.
2. You left them “unassigned” in a campaign and somebody in there “claimed” them from you. You need them to unassign those characters so you can claim them again.
3. Gremlins. This is the least likely of the three, but it is theoretically possible that a computer glitch are your PCs. In this case, contact Customer Support and they can restore your characters for you. https://dndbeyond.zendesk.com/hc/en-us/articles/360055233654-Contact-Information

I hope that helps.