AFAIK you won't be notified of posting a dupe; it's simply rejected. I haven't posted in ages, so my knowledge is likely out-of-date.
Overlooking any of the required information could possibly cause it to be rejected. <shrug>
But FWIW, there is no team of quality assurance agents testing and assessing your uploads. It's primarily the input data that matters. If it turns out that you misidentified the file contents, then that gets handled after-the-fact.