No expert either but I think that magnetic fields have everything to do with rotation within an existing for field or band of force.
In the case of our Sun she has 9 increadibly powerfull bands of force with which she holds on to 9 planets orbiting at sufficient velocity's to resist being pulled in.
All spin or rotate at different rates while being held by that solar band of attractive force, therefore generating different levels of magnetic field.
In the case of our Earth it has two major bands of attractive force at work on her, the Sun and the Moon.
I suggest that the Earth's magnetic poles are not at the axis poles due to the field being generated a right angles to the solar attractive lines of force.