Windchill opening old iteration
For some reason we have discovered one assembly in our database that refuses to open with the latest iteration in Windchill. We can add the latest iteration to our workspace or by opening directly from Creo and as it's opening it does display the latest iteration then it changes to an older one at the end of the opening stage. When the older iteration is opened the workspace doesn't seem to recognize anything as being out of date.
When you synchronize the workspace, it suddenly realizes it should be the newer iteration and displays that way in Creo and all sub assembly parts update to the proper iterations as well, but as soon as we regenerate in Creo it snaps back to the older iterations.
This is has been shown to be happening with a few people opening this same model.

