2) Even if CZ was part of the original CryptoNote team, there's no indication that he was involved with Bytecoin at all.
There is no credible evidence (i.e. evidence not coming from them) that cryptonote and bytecoin are actually separate. The evidence from rethink-your-strategy would suggest otherwise. That evidence might be not totally definitive but the preponderance of the evidence definitely points in that direction (since there is no contradictory evidence at all)