I am aslo facing te same issue. We use sccm 2012 R2. I am able to successfuly update windows 7 Ent x64 image using scedule updates(offline image servicing) and updates are showing as installed in Image properties->Installed Updates and also on the log file. But when I deploy this image using task sequence I cannot see any of these updates installed.
On the machine on which I deploy this image, when I check for updates online using Microsoft update, these updates which I installed using offline image servicing show as missing and I am able to install them using windows update. Example updates: KB300061, KB2972280.Any help will he highly appreciated.