I agree it would be good to make sure the agent is telling people the correct information and reduce the chances of future arguments. When units change hands is a good time to have unapproved eye-sores removed, be clear about what is whose and so on. However, ultimately, the strata plan is what shows common property and the unit area. If a new owner was told the wrong thing it is they who have an argument with the agent or the lawyer who did the conveyancing.