Audio & video software: iTunes 8 displays a few songs with the wrong run time

iTunes 8 displays a few songs with the wrong run time

I'm confused...sometimes when I rip audio from YouTube, and then add it to iTune's Library, it'll (rarely) make the song's run time appear about nine times its normal run time. Like for example if the track's run time is three minutes, iTunes will display it as 26-28 minutes. It has done this to four songs in my iTunes Library...

The weird thing is that that's the only part of the file that's affected. Its file size and everything else still remains the same. But if you let the track run till its original run time's end, it will stop like it should, despite the extra twenty-five minutes that are remaining.

Please help.