A large X next to the name means the swim was an exhibition swim (not usual for most swimmers). Exhibition swims count only in the fact that they are offical times for the swimmers, but they do not count toward the overall score or for placing.
Disqualifications (usually for a stroke infraction such as finishing on the stomach in backstroke) will show as "DQ" in the results.
Final score is the accumulation of points. In case you didn't know, WST has won both of the dual meets this season! Congratulations!