This article will provide information what happens when second PC is connected at the same time for the same game.

Please avoid connecting 2 different PCs for the same game at the same time as only one feed is accepted by the system. Which of the feed will be accepted may depend on what is done on the two PCs - if the the match is scouted with both of them or if one is just kept connected without actually using it. In any case both will try to connect to Stats Engine “stealing” the connection from the other. This may lead to discrepancies of match data. 

It is ok to have the match loaded on more PCs, but during the game scorer should use only ONE PC at time. If a security USB drive is used and the backup functionality in ESS is enabled, in case of issues it will be possible to promptly restore the match on another PC in a matter of seconds.