for reasons unknown to me, the MIN is actually the number used by the switches and towers to identify your phone. Some of the time the number is the same. Sometimes it isn't . My theory is if you change your number, your MIN would stay the same. And that would explain why you have non correlating MINs to mobile numbers.
I'm not saying that you would have to change your number. I know not everyone on here has done that. But if someone elses MIN is identical to your mobile number thats where you get the overlap.