Question

There should be a option for merging duplicates, as the single and the same song in the album takes up the chart...

Answer 1

what do you mean by this?

Answer 2

this site only takes data from last.fm, for a change like this to happen it would have to be on last.fm first so then it could change here

Answer 3

but you already can do it if you're a pro on lastfm

Answer 4

i think you can do it if you update to last.fm pro