They were rejected for one of the following reasons:
1. Copyright issues
If it's in the charts it will be rejected: www.theofficialcharts.com/top40_singles.php
2. Ringtones have to be ringtone length (28 secs or less).
3. Ringtone is already in the gallery
4. Poor quality- very, very, quiet ringtones will be rejected.
5. Title of the upload is very ambiguous. For eg: song, mp3, funny
6. Unsuitable content- Please upload clean files only -no swaering
Please see the below forum topic for more clarification:Ringtone Guidlines