- Will someone pick up both or just the stronger one
since both APs broadcast exactly the same packet, the client would see only one AP (Thats not always true, I think there is channel hoping involved, and it depends on what drivers/software the client is running)
- Will everyone connected to the access point be redirected to the re-broadcasted signal
It doesn't work like that. The client knows if it is connected to it's AP, by sending probe requests every few seconds, and the AP has to reply to this requests. You said that you are changing both the bssid and essid, that's all the client has, to identify the master AP. Now, if you set the rogue AP to respond to clients probe requests, then the client will take 2 probe responses on each probe request, but this will probably not affect anything...
If you set up routing on the rogue AP, and you reply to the clients packets, then the client will accept as the real packets, the ones that come first, and ignore the rest ones (again, it depends... there are always exceptions), see Airpwn