You may not believe it, but the GTS and Pro was the 13rd and 14th ever added graphicscard in hwbot database. No one at this time thought about combining categories. Detecting differences is hard between them, thats true. But oldschool experts usually know their hardware very well. I have a vision for fixing those categories but it takes some time as needs to programmed first.
About your reported submission, you probalby need to elaborate whats the problem because its not really visible at the first sight.