Do the four Sunni madh'habs divide Muslims?

What are the rulings over differences in opinion between madh'habs? How should they be resolved? As an example: as the Hanafi interpretation of 'Praying the prayers according to it's time' leading to a later time for Asr. How are these differences of opinion over madh'hab aligned with the ideology of Islam having no sects? ### Edit My understanding was that, in this example, there was a hadith that prayers should be prayed 'according to it's time' "In it's just time" and the Hanafi scholar ruled that this meant towards the end of it's time and the other 3 rules it meant towards the beginning of it's time. Thus there is a division, with one group believing one thing, and another believing another thing. **And yet the different madh'habs aren't treated as sects. Why is this?**