a) OTA update doesn't work with CWM. That's the reason you get stuck at first place.
b) What do you mean by "flash another rom also and reboot again back to CWM". Did you offline flash KDZ file, factory reset and it still go back to CWM? That is impossible as offline flash KDZ will definitely destroy CWM.
c) Be patient. People come here to help, but it take time.