You have the latest rudder system (2 years now)? New boat? Rudders stand straight up in the air when in the up position. Older rudders had the Mirage Twist and Stow which laid flat on the deck.
Right hand steering issues with that rudder were related to holding the rudder down with the cleat provided. If not cleated down, the boat looses steering when trying to turn right... the rudder starts rotating up due to water flow loads.
All older style rudders are eligible for a no charge retrofit if that is what you have:http://www.hobiecat.com/articles/tandem-island-rudder-update,23/
Or maybe the rudder control line are simply not adjusted correctly. Steering handles should be angled to the right with the rudder centered. Find the mid point in the handle turning radius, then adjust lines to center the rudder.