1) Give the ability to change your vote. Its pretty inconvenient being someone who likes SK races, sometimes the -SK bit is not shown in the options to vote and I vote for some race other than SK. Or you dont notice some race you'd like.
2) Why not make some fun stats in the highscore page? Like average finish position for a player, average points (non-record points) gathered per day for a player, longest win streak and other fun info.