Create two user packages, one with edited group policies.
Another package without edited group policies.

Both work using Zen 4.1 agent. Can logon to machines with accounts using both packages and both their policy changes take effect.

Upgraded some machines to Zen 6.5 agent. Only the user package with edited group policies works. I can make changes and login to a machine and the changes will take effect.
But when I log in to a machine using the package without edited group policies. The changes don't take effect.
The edited group policies are still in effect.

Both work using Zen 4.1, but not using Zen 6.5.