You're completely missing the point. Of course I don't believe everything that Augustine says. But I do accept his argument that Genesis, and the Creation Account in particular, can't be taken literally. Is this an all or nothing thing? You either agree with everything Augustine ever wrote or you don't? Don't be ridiculous.
Gotcha. Yep. Secularism all the way. Never a doubt but you just admitted it. Cherry pick your data and call it facts. And that is the name of evolution.