Customer ripped his wav files using Windows Media Player. 
When he scans his music library, the first song in each album is scanned separately so he ends up with two albums one contains the first song and the second contains the reset of the songs from the original albums.

This occurring on both 7.4 and 7.4.1 

I asked the customer to email us a couple of his wav files from same album. The first file will be the song that scanned separately and the second is from the reset of the album. We tried to compare the tag information but we could not see any obvious cause for the problem.  

I cannot load the file into Bugzilla, because of their size, I have them in computer if anyone need to look at them. 

RN = 091020-000261