Understanding Of Quran
1) Yes. According to them, there should be only one interpretation. 2) There is always room for improvement. There might be some aspects which may become more precise at a later stage. 3) Yes there are some differences. For instance, Molana Farahi divided the Quran into 9 groups, while Molana Ahsan and Ghamidi sb insist on 7 groups. 4) The concept of nazm has always been there. However, the work of Molana Farahi provided a solid foundation for the concept. I think it is still to be recognized by the scholars of Arab. Few scholars from India has acknowledged the nazm concept but it is still not accepted widely.