Neither as far as I can tell.
For example both the issues (before I added #4) of http://www.comicvine.com/comic/uncanny-origins/7197/ had two of the same cover, but it doesn't look like someone else submitted those. As far as I can tell thats the only time I found that problem, just from memory and glancing through my submission history.
My guess is it was just residual from whenever you guys uploaded all these issues initially, I haven't noticed it in new issues or volumes, I just added like 4 new volumes last night and they all look fine.
Maybe Le Francais has noticed something I haven't?
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