ITunes 11 saving songs to admin instead of user account

ITunes used to save my purchased songs to my User music Library. Today I purchased a song and it saved it to my Administrator account. How can I fix this? In addition When I try to add a file or folder to iTunes frequently iTunes doesn't recognize the song or folder in My Music Library. The file just doesn't show up in the folder box as an option. I am at a loss. Please help.