User blog comment:TDFanatic52/What if there were no alternate endings in Total Drama?/@comment-11883116-20160304031517/@comment-11883116-20160305164909

Because both endings are a part of this cartoon produced by the creators, not just some fanmade fictions. Of course, in-universe, they aren't winners at the same time (just in two separate timelines), but in the real world they are. Hope this explains everything.