I don't know what you are looking at, but the MLS says it is 2913 square feet. When it sold in 1998, that MLS number also said 2913. Would you like me to open up a gateway for you that will email you correct data directly from the MLS? It's a live feed. The reason that Travis County Appraisal District shows something slightly difference is because the 2913 square footage was probably from the builder and the 2903 was probably on the original specifications that TCAD received before the subdivision was built out.
I will be happy to help you receive correct data.
With kindest regards,