The Vita-Chambers are tuned to clone anyone with genetic information similar to Andrew Ryan, In bio 1 your his clone, in bio 2 Elenore hacked the chamber to bring you back, it flash clones you when you die because of remote sensors in your body and they are tuned to "react" only if you die traumatically, so the reason your restrained in bio 2 was to die naturally through either starving or dehydration because of the air tight suit, if you ask why Andrew Ryan died in bio 1 he turned of his office's chamber