Daphne – are you sure that it’s not the ABN attached to your Strata Plan’s Account, because that would be different from that used by your Strata Manager?
In any event, I don’t regard your discovery as unusual, as one ABN my attach to the Strata Company’s business name and the other to a trading name or to the individual Licensee who may be required to hold and operate a trust account.
If you want to check “ownership” of the ABNs and the relationship between them, then search HERE.