Sounds like you need to measure your axles for proper alignment. If you are inclined to crawl under to take some critical measurements on your own, there are some on this forum can give you specific direction. Otherwise, make an appointment with your dealer, or a dealer or a service center. Check your tires for odd wear patterns too.
Regardless of who checks this out for you, if it's determined that you are out of alignment, I suggest your dealer contacts Heartland's Customer Service department (574-262-8030) to discuss the matter.
Best of luck and do circle back here to let us know what the issue and solution was.
Jim