1) Way to spoiler those like me who hadn't seen the ep before coming upon your question in AB.
2) Helen's clone tech leaves the way open for any "dead" characters to come back should the actor/production team want to.
3) It was definitely Cutter who Helen shot at (I was keeping an eye on the jacket), but not definitely Cutter who we saw die (as we didn't see him get shot). It would seem unlikely that the clone got so talkative, though no more unlikely that a lot of the shenanigans in Primeval.