No problem. I actually spent some years, learning Islamic Sources. Obviously i never claim I know it all. But, from what I have learnt, the story is, in Islam there are many Recorded Traditions, in addition to Quran, which would help understanding Quran, and interpreting it, through learning how Muhammad and His House hold explained and practised Quran. But, because Muslims became divided into several sects, thus, each sects has owned their own portion of recorded traditions. There are two major sects, sunnis and Shias. The Sunnis would not use those Recorded Traditions which are available in Shia sources, saying, we do not trust them to be authentic sayings of Muhammad, and the Shias do not want to have much to do with the Sunni collection of Hadithes. Thus, although these recorded traditions would help, having a united understanding of Quran, but because each sect has only a portion of the knowledge, they cannot agree on interpretations of many verses of Quran. More recently, there is a newer Quranic sect added, saying, we do not need Hadith to understand Quran. Thus, they use their own mind to interpret verses of Quran, and thus in many cases, their interpretations are different than How Muhammad and His Household explained Quran as seen in Recorded Traditions.
In Bahai faith these Problems are solved. Bahaullah wrote that, after Himself, All Bahais must turn to Abdulbaha for interpretation, as He is the only one who knows the interpretation of Bahai Scriptures perfectly. And Abdulbaha wrote a lot to explain Bahai Scriptures, thus, the Bahais would not disagree about interpretations, as we only refer to Abdulbaha's writings. This is how the unity of Bahais is maintained at the worldwide level, and no body could succeed in making divisions and sects within Bahai Faith (thought there has been attempts).