Guild Wars 2

I was recently gifted HoT and just finished training up Gliding.
Now, I also have gliding on all my other non-level 80 characters.
Is this a bug?

Sal

No. Masteries are account-wide. They are not character-specific.

Good luck.

Oh OKay, thanks!

No problem.

Just an FYI: The Wiki (link above) is a treasure-trove of information for the game.

Welcome return, and good luck!