The bible is not to be interpreted literally, when it seems to offer contradictions, otherwise it should be...
God created the first humans on earth, but he didn't...he just created the better ones...but he created everything, and Genesis is the story of creation..ok, I am confused.
My favorite part about Christianity is...God created all life, created humans, knows everything they will do, and will punish them for eternity if they don't follow God's convulted/confused/unclear rules. So, God created the earth as a big test, and either doesn't love/respect humanity(sees us as mice), or he is just pretty sadistic.