No worries, the double page threw me as well.
Ok so, I boot into Cwm > install zip from sd when I then tap power I'm just taken to the previous menu. Did you mean tap home? (I'll use > to indicate home key tap)
When I'm in Cwm > install zip from sd > options are:
- choose zip from sdcard
- apply /sdcard/update.zip
- toggle signature verification
- toggle script asserts
Where to go from here?