The strata manager is correct, according to the act
You may think why can’t they just accomodate my request. The answer is that the software that most strata managers use to manage most aspects of strata don’t allow for two addresses.
Its a bugbear of mine thst when I self managed a strata complex things like this were easy to do. When we went to management by a strata manager, there was less flexibility in any aspects of the management. If the software didn’t do it, there was no exceptions.