I'd like to point out that this kind of stuff doesn't happen by accident. Those are more than likely sha1 hashes: the function returns in the same format, lowercase hexadecimal. It's truncated because the master server only allows a maximum server name length of 23. Why 23? no idea.
Another clue that this isn't a computer glitch is that the gamemode name is always the same as the server title every time. That's really not a coincidence.