We have experienced a similar problem at our complex as it is common for pavers to move over a long time period when laid on soil rather than concrete. In our case the courtyard areas form part of the adjacent lots. Does the strata plan have something which looks like an “S” drawn on the line between the main area of the lot and the adjacent garden area? This would indicate the garden area, as described, forms part of the adjacent private lot.
The next question we encountered was whether the pavers were in place at the time of registration of the strata plan, or a later installation by an owner? In our case the pavers have been laid over the top of the original grass, by the current (not original) lot owner.
We have not yet adopted the Common Property Memorandum, which lists pavers as a lot owner’s responsibility. We have not yet done so because the strata plan takes precedence and we want to have a solicitor check for inconsistencies between the strata plan and the Common Property Memorandum.