To be precise, this wasn't a match but a multiplayer strokeplay.
The forfeiter or quitter simply has a lower "final" score just because he played less holes. The display has been wrong "forever", three, four years, but is obviously not worth enough effort to be fixed. Apart from that, there's no importance to this wrong message after you left the game - no record, no stats whatsoever.
More important and related to this issue is the annoying "Want to forfeit?" pop-up appearing because the quitter's invalid but low score. But, we won't influence that either.