I requested a series request of Wild Kratts and it keeps getting rejected, The reason was "This already has a leaderboard" even know it isn't a game.
Did you mean to submit a series request for this? Series are something completely else from single games. Not sure but when searching for Wild Kratts on SRC: https://www.speedrun.com/wkbar is the only result. (Not quite sure whether its the same game you are referring to)
No, I was creating a series for this game, Speedrun.com's series requesting is pretty broken (not being mean)
Just because there are more games of Wild Kratt, doesn't mean it actually requires a series. We are going to be much more strict with series (moderation) requests moving forward. You are welcome to submit these as single game requests like Habreno pointed out.