Yes, the key is our Opponents WP (OWP). Since this is weighted twice as much as OOWP, Southern's dismal OWP does not hurt us as much. But obviously it kills Southern's own RPI as this is 50% of their calculation.
However, with UNO, their dismal record kills our OWP ... but their dismal record has more to do with the much tougher schedule they have played (when compared to Southern). This is reflected in their OWP (which is weighted less in the Cajuns' OOWP).
This is also why South Alabama's win over Auburn last night really does not help the Cajuns any more than if they had beaten a team with the same winning % ... say a #115 RPI team (Indiana State). South Alabama's opponent last night is included in the Cajuns' OOWP calculation. But the formula does not go any deeper. It does not factor OOOWP.
Brian