Cancel ONE of MANY in a Batch upload

This has happened to me more times than I'd like to admit. It appears that others have posted similar requests. There is "Warn to Prevent Duplicate Uploads" and "Cancel Media During Upload/Import". This is a variation of the same class of problem. I upload files in batches... and sometimes the batch gets stuck... some made it all the way and some didn't. It turns into a big research project to find out what happens after the fact. ANNOYING because it should be simple to have Searchie warn that that file exists (since it is the exact same name). Sometimes I am uploading a batch and discover a file that was important to upload, and it has made it... but because I start a batch and leave or do other things... I don't erase them immediately, just in case they don't make it. So here comes the next batch a week later and it's uploading and some are already at 65% when I notice that one that is already uploaded is there in the new batch and it is at ZERO %... Can't cancel that one out of the batch... have to let it go forward, or hang out and wait for the 65% one to complete, cancel the entire batch and eliminate the one that is already there from a new upload list. If you can't check for duplicates, which just eat our allotted space up... please let us tag one that needs to be cancelled in a batch when we discover it's about to be uploaded again. Thanks!