Complex sentence: Around 2001-to early 2002 it was official Nik Lacambra was kicked out from the band under the name "Common Ground" we don't quite know what the Mishap was, but that he was not seen around the band from then on.
Split into simpler sentences: Around 2001-to early 2002 it was official Nik Lacambra was kicked (or left) not sure. From the band under the name "Common Ground" we don't quite know what the Mishap was, but that he was not seen around the band from then on.