It Looks Like They Chose The Wrong Arabic Script When They Wrote Down The Original Quran
If anyone looks up the history of Islam and they also have a look at the oldest Manuscripts, then they will see the the original Quranic Arabic was written with out diacritical marks, which means that the words can be pronounced in various different ways, depending on what the reader decides that the context is. It seems as if it is this flexibility in interpretation, that has caused various readings of the Quran to appear, which will even have different Arabic words in them.