That doesn't mean anything. Many airlines offer codeshares with airlines that aren't members of the same alliance. Similarly many airline websites sell tickets for flights on other airlines, including airlines that aren't members of the same alliance or even codeshares services so as to allow the customer to get to their ultimate destination. Alliance status, like with oneworld, is meant to provide certain benefits when flying a member airline, not when purchasing from a member airline and flying a nonmember airline.