You are now twisting words again it isn't "confusion" - that would refer to SECTS but with Muthahib - there is IKHTILAAF - Difference of Opinion.

That is a good thing to have in Islam - otherwise there would be one authorative figure who legislates and decrees and interprets and the whole religion must follow that one interpretation- There is no pope in Islam- as explained in previous post.

Difference of opinion also is good for having a middle ground - between extremism and total liberalism.

Also one thing you should realise about Muthahib is that they share the same AQEEDAH - that is beliefs. All the muthahib - including the shia Jafari mathab all agree - there is Ijma3 - consensus with regards to the Oneness of Allah - Tawheed - the Finality of the Prophet, the Quran and the importance of Sunnah etc - all these differing schools AGREE on these fundamentals. Their only differences are a matter of rulings - FIQH not AQEEDAH - with which NOI and Ahmadiya differ in - hence are not difference of opinion but having a different Aqeedah altogether, e.g Allah incarnate, race supremacy, a different final prophet etc, etc