Does anyone remember this Stargate episode?

Vala first appeared in Prometheus Unbound in season 8, then not until season 9 premier. Ripple Effect is the only one that sounds like it. I think you have some different episodes mixed together. Tin Man had 2 SG1s, one android and the real ones, and the guy was alone and had a machine. In the season 3 episode Point of View, an alternate reality Carter and Kowalsky come through, and there were 2 of everybody, and in Ripple Effect a bunch of SG1s come through, but only the real ones and first ones through go on the Prometheus and fight for control. In the end everybody was sent back to their rightful dimensions.