Is there any point it being in the sub category if its in the main category aswell e.g. in Football Games and Sports games?

It's mostly for grouping and identification purposes. Like how Super Mario Sunshine is under "Mario games" and is also under "GameCube Mario games". And as it turns out "GameCube Mario games" are all Mario games so they get put under "Mario games" as a sub category.
It's the same thing for the Sports games. Some days people will want to see all the Mario games or Sports games, and some days they might want to see something more specific ("GameCube Mario games" or "Football games"). --FF_Fan 12:38, 6 December 2008 (UTC)
Community content is available under CC-BY-SA unless otherwise noted.