Copying to beta shouldn't affect it. It's just a column in the database. Come to think of it, it would probably copy to beta WITH your character.
Now, yellow titles DO typically have expiration dates set when they're handed out. It's possible that your warshade got it applied at a different time, or even by a different person who didn't use the same date. I'd wait to see if anyone else who got it around the same time you did is missing theirs as well.
I really doubt that anyone is taking vindictive action on the servers. From my understanding, only a few people still have any kind of admin access to them, and those that do are part of the sunset team whose job is simply to keep them up and running for the next few weeks, no more or less. It's just a couple folks in the Austin datacenter.
