http://iscoresports.com/

This is the first year of playing 9 man baseball, so the roster has to reflect a 9 man lineup, etc.

In the 6th inning, we had a sub come into the game, replacing the 9th hitter in the lineup.

Following the game, a review of the stats indicates that the replacement player has received the stats for both he and the player he substituted, as if the replacement player had played the entire game.

This means you did the substitution incorrectly. Sounds like you used "Show Starting Lineup" instead of substitution.

See this link:
http://iscoreleagues.com/manual/#h.l4oftesdro7a" onclick="window.open(this.href);return false;