(1) The Qur’aan and the Sunnah provide the basis for uniting the Muslim Ummah and the prevention of anarchy. And Taqleed has not been prescribed. The Messenger of Allah (sallallahu alaihi wa-sallam) said, “I have left you upon clear proof, its night is like its day, no one deviates from it except one who is destroyed, and whoever lives (long) from amongst you will see great controversy. So, stick to what you know from my Sunnah and the Sunnah of the orthodox, rightly-guided caliphs – cling to that with your molar teeth…”[1]
(3) The Madhhabs themselves are not always united in themselves on a particular ruling. For example, most Fiqh books begin with rulings on worship and the first step towards worship is purification and the first step towards purification is the cleanliness of the water, and only on this issue itself there are multiple differences amongst the Hanafees themselves. See Fathul-Qadeer by Ibnul-Hammam al-Hanafee, which is an authoritative book on Hanafee Fiqh, p.68-81.
[1] Reported by Ahmad, (4/126), Ibn Majah (no.43), al-Haakim (1/96) and others.