The possibilities are numerous and somewhat complicated, but I’ll try.
One scenario may be that the first drawing was produced by the Developer, and it had for convenience allocated all parking spaces to the one Lot, and then nominally allocated each of those to individual Lots as each was sold; a first in best parking space approach. Then when the majority, if not all Lots were sold and their parking spaces allocated, the Developer may have produced a revised drawing to reflect that.
The second scenario may be that after the majority, if not all Lots were sold and their parking spaces allocated, the Developer then registered that drawing, i.e. the second one you have, as the Strata Title Plan together with the applicable Unit Entitlement allocations, which can be done without the need for an approval by the Owners Corporation.
The last scenario is that assuming either of the drawings produced was indeed properly registered [eg with Land & Property Information (LPI) in NSW] then the Developer could still submit and register a Plan of Strata Subdivision showing the parking space allocations and the applicable Unit Entitlement allocations. Again, that doesn’t require the consent of the Owners Corporation itself but rather the consent of all then Lot owners, but it does require Council approval either directly or by a Private Certification (most developers’ preference).
Whatever the scenario, what matters is the drawing that’s been registered as the Strata Title Plan (STP), which will also show the Unit Entitlement for every Lot and thereby give you an indication of whether the Levy amount you’ve quoted is correct (relative to other Lots). Visit the website of your State/Territory “Land Titles Office” (LPI in NSW) and use your Strata Plan number to search for and download a copy of the registered STP.