Problem with merged songs

Lately many songs have been merged/ updated but it has many issues now. I have lost all stats for some of my favorite songs, sometimes even over 1000 minutes gone. I’ve noticed this probably happened mainly to songs that have been merged as they have had two copies (ex. Nude by Radiohead, My heart is the worst kind of weapon by Fall out boy ). I believe this feels unfair especially for people who were trying to get on leaderboards.