In my experience, HR reps will tell you anything to get you to take a job they are having trouble filling. They have nothing to lose, and everything to gain by telling you what you want to hear. 18 months from now, that HR rep won't be there, and no one will remember promising you the chance to move to another office or better position. In the end, you'll quit and they'll make that same promise to another sucker. Don't take the QA job now if that's not what you want.