iWork documents on my iPad and on my iPhone merged and cross-synced when I activated iCloud on each device and launched each app for the first time. Worked just as advertised.
Try turning off iCloud document sync and reactivating.
All my docs were on my iPad, but after turning on backup to iCloud they all disappeared and are now in the sky. The kicker is that when i go in settings and for the Pages app turn iCloud to on, open pages (nothing there), go back to settings, the iCloud option is off..... so I can't activate iCloud for iWork apps... and I can't get my docs back.....
Have tried to restart, hard reboot, restarting apps, checking iCloud settings 100 times.... now on the phone to AppleCare
Edit: The guy on AppleCare didn't have a straight answer so he'll call back...