Those might be corrupt and iTunes might not count them.
You realy counted all your music ? O_O
I am relatively new to the digital music thing. I purchased an i-pod and have put much of my cd music into my i-tunes library. I have also purchased some music from i-tunes. What I am finding odd is that my i-tunes library says I have I have 802 songs at the bottom of the page, yet when i went through and counted them, I had 836. My i-pod also says I have 802, yet there are some songs listed in my i-tunes library that are not on my i-pod. Please help the ignorant.