about 2nd solution, when you conected to magneteic with north-north, and South - south , infact, you have one magnetic which is weaker than both of first mgnetic because, their magnetic fields destroy each other...
in 1931 dirac introduced the magnetic monopole in order to explain the quantization of electric charge , which follows from the existence of at least on free Magnetic charge.. eg=nh/2...
we assume the MMs may exist, but we just have not been able to observe them experimentally...