In her defence, they walked in this case, but yeah, you'd think that in a month, the Daedalus could have got out to Pegasus and beamed them up. Or, you know, I'm not picky, I'll settle for 'why hasn't Atlantis come to rescue us, what on Earth can be wrong?' and we find out at the end. But it's like they stepped through the gate and Atlantis completely ceased to exist for them.