Collection error

https://lyricstranslate.com/en/collection/westlife-greatest-hits-vol2-2011
Hello, I have tried to create this collection, but it keeps to sort it mistakenly when I try to save or save as a draft. And I don't know why.

For example, "Swear It Again" should be on the first order, but when I save the collection, the song is on the other order.

The collection contains more than thirty songs, so it is very hard to fix the orders. I hope someone would help me.