if you really care about this position

send a quick note to HR about the typo. The key is to use a very light tone in the email to make ppl feel that it's a very minor overlook. I can't imagine ppl will take this kind of clarification in a bad way, if anything, they may think you are being honest, which is a big plus. In case they've already found out the inconsistense and are bugged by it, your email would save you big time.