Billing Problems!!!

I have a billing question. My bank account was charged (3) times on same day (6/12) for MC-APL*ITUNES. AMounts of $49.86, $49.95, and $49.68. Was a mistake made. These are all direct withdrawal payments. Has a mistake been made or is something happening that involves some illegal activities? My children have said they don't understand what this is about. Please advise. Thank you.