Why cant I use loops in YouTube???

I love this app. But lately all of my content that I created using the app is being flagged by YouTube as copyright material and it is frustrating that a royalty free loop is being flagged. A lot of people use this and there are chances that you may use the same loop at one point or another. How can we use the content Apple if youre going to goad down are content?

Martini Chic about GarageBand, v2.2.2