What you describe is very odd. Are you sure they are not holding magnets with a centre N pole and an annular S pole round it. I suppose what you describe would be the same thing if you added a steel disc to one face.
Did they come from an engineering supply place or something where they would be used to hold work pieces or a DTI. ( Big fridge magnets )
Sounds a though you may have a case to send them back.
Flux