Noticed some some werent full length

[Avamps]

Found a new band I like so I added them on Spotify. When I listened to one of their albums through the player I thought it sounded like a couple of the songs cut out early so I restarted the track and it happened again. When it happened again I looked at the song length and sure enough it was 40 seconds shorter than the original version and so were a couple more songs in the album. But their other albums were just fine.

Would like to know if there is a mistake somewhere or if I will just have to live with incomplete songs.

Band - Black Rainbows

Album- Carmina Diabolo

songs- Under the Sun, Whats in your head, Return to Volturn, and The Witch