▶ REPORT HERE: Error in a track/song/album

Hi,
I have experienced an error in a couple of tracks. How and where do I report errors?
The error in question is that the song jumps back to an earlier verse at a certain point of the track. Then, when there's 0:00 mins secs left of the track left it doesn't stop, but carries on playing until the song is over.
It's been doing this for "Enemy Inside" by Dream Theater (studio album version) and "In the name of love" by U2 (the best of...-album)