I finished upload of a batch, it got accepted. After some time it appeared under Uploaded files again. Since I have a lot of pictures and batches every week, I didn't even notice they are duplicates, so I submitted them again. I think some of them appeared under Uploaded files for third time, or I'm gone crazy. I wanted to clean the mess and got ready to delete duplicates, since they dilute sales of original files, but I don't know how to delete a file on Adobe. Does anybody know?

Did you try refreshing? Or dumping cookies and such?
Also I have heard that AS has been having issues with their site lately. Mainly with pics not showing in your port soon after uploading. I wouldn't be surprised if some more issues came up. You can always make a support ticket thingy?

Thank you for your reply! Yes, I will make a support ticket today. The number of uploaded files keeps growing even when I'm not uploading, duplicates. I will stop submitting content for a while.