This doesn’t make sense. Community property is not a common law concept. Rather the opposite, in that community property is established by statute in every state that I’m aware of.
Your cite addresses two concepts, ASAIK correctly. 1) The **majority **of states base their law on common law, rather than civil law. (Not 9 or 11.)
There are 9 community property states.
The two statements in your source are separate. The second group (community property) is not set forth as a subset of the first (common law states).