Ah so they where interlocking, I just cheated and used delays and different tunings so the highs from one would match the lows from another, mind you there wasn't much (if any) phasing in mine.
No, I needed to have a couple of 303's playing patterns where one would start the pattern and another would end it in a bar. It was because the fx routing required each 303 to be programmed with their own banks to create phrases