Complex sentence: Ahmadi's believe the original prophecy regarding a latter day messiah had diverged into separate theories and distinct interpretations and this filtered through different religious movements, although it was originally meant to refer to only a single Messiah.
Split into simpler sentences: Ahmadi's believe the original prophecy regarding a latter day messiah had diverged into separate theories and distinct interpretations and this filtered through to different religious movements. This prophecy was originally meant to refer to only a single Messiah.