@Karatori please and thank you 
EDIT: please also ask the player if they had any error messages with a “retry” button pop up at all during their Guild Wars matches, if they were playing on mobile while on the move (ie their connection may have temporarily dropped for example).
EDIT EDIT: We still can’t find where these points are leaking out so we’re looking into the possibility of maybe something strange is happening to A battle where the results are somehow partially submitted to the game server so if any guild who gets this issue can find out if members had any weird errors when starting or, probably more relevant, submitting the battle results at the end, please let us know.