Unathorized when is Authorized

When I try to play some of my songs it says it's Not Authorized. These are completely random, a few albums I bought 3-5 songs in each album are Unauthorized all over the place. and when I type my info in it says This Computer Is Already Authorized. So I tried De then Reauthorizing my Computer...Nothing. So my other attempt was to Re-download the album/songs and very few would work and most others still didn't.

Also having some Duplicating Problems.

Thanks for any help in this matter.