I made this HOWTO to help anyone else that may have the same problem as me.
I had a lot of random MP3's that had correctly labeled ID3 tags all stuffed in the same folder.
In order for Madsonic to work correctly i needed to place all the songs of each artist inside a folder named after the artist.
I hope this helps
Let me know how i can add all 12 pictures at a time because it looks like i can only add 3 at a time.