I hit level 30, picked marksman but it made me a duelist... Is this right?

You start off as a duelist, then have the choice between Marksman and Pyrotechnician at level 30, double check everything to be sure, such as if you clicked the right thing or, if there is a quest involved, etc, you could try clearing your browser cache/cookies and refreshing to see if that changes anything. If not you could submit a bug report here: http://www.aeriagames.com/forums/en/viewtopic.php?t=1871297