The plan I got back is called a Survey-Strata Plan. What is the difference between a Strata Plan and a Survey-Strata Plan?

Two types of schemes are permitted under the Strata Titles Act 1985, strata schemes and survey-strata schemes.
Strata Plan

A Strata Plan is the mechanism for creating strata schemes and strata titles under the Strata Titles Act 1985 as Amended. Strata plans define the lots in a strata scheme (areas owned individually) and common property (areas owned jointly by all lot owners in the strata scheme). Strata lots are limited in height and depth (the stratum of the lot). Strata plans show a building on at least one lot of the Strata Plan and stratum of the lots is always linked to buildings shown on the plan.
Survey - Strata Plan

A Survey-Strata Plan is the mechanism for creating survey-strata schemes and survey-strata titles under the Strata Titles Act 1985 as Amended. Survey-Strata Plans define the lots in a survey-strata scheme, which are the areas in the scheme owned individually. Common property areas owned jointly by all lot owners may, or may not exist in survey-strata schemes and are defined as "common property lots". Survey-strata lots may be limited in height and depth but generally are not. No buildings are shown on Survey-Strata Plans.