Good advice!Best to take the side approach. Just say to Pastor "you're hoping to clear up some questions you had. I'm being taught XYZ currently in Sunday school but it's been my understanding that XYZ is not biblical and I believe ABC. Can you clear up the the issue for me on where the church biblical stands. "
If the teaching is against that of the church then he will more than likely followup. If it's not, then you know where everyone stands.