iTunes song not authorized to computer keeps popping up
I bought an album a few days ago on iTunes and every song plays on it, except for one. When I try to play it, on iTunes (on my computer) it says that my computer is not authrorized to play it and that I have to put in my apple ID, so I do, and it says that my computer already is authorized. I also can't play that same song on my iphone.
I also tried to delete the song from my itunes and redownload it, but I didn't do that because I noticed that the whole album wasn't under purchased on my iTunes. Is it maybe because this album was preordered?
Why is this happening how do I fix it?