Extra stipulations like "Not to be redistributed or sold as is" conflict with the selected license. All licenses on OGA allow for redistribution and reselling. Not that people ever really resell assets that they're required to tell people are free, but the license still allows them to try. Would you be willing to omit that stipulation? Until then, I must mark this as having a licensing issue to prevent usage you may not want.

EDIT: Fixed, thanks! :)