How to remove the surplus release

Please, make searching string in https://www.pond5.com/index.php?page=releases

Error: More than one file matches. Please go to releases and remove the surplus ones.

How can i delete release, if no such function on https://www.pond5.com/index.php?page=releases

how I will find the same releases without searching field , if I have 1,900 releases. and alphabetical sorting is only on one page, with only 100 releases.
i want sort all releases at once.
Create a release merge function, please. so that the site itself finds the same releases and offers to combine them.
How can i combine similar releases?
why does the site allow uploads of releases with the same names?

How to download full list of releases?

I have 20 similar releases with the same name. I did not upload so many similar releases. I think , it is problem of site.

I deleted the video in the dashboard, but the link to view it is still active?!
How to delete a wrong file completely?