i have noticed i have made a lot of duplicate ads on one local site

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It is like an ebay but this is just a local kind but not part of ebay. anyway, since I am just new to posting ad to sell something so I didn't have much idea on how to post ad. So i thought my first or previous ads didn't get publised so I keep on posting again till I have made like 8 different ads of the same product. So I have received one comment or message on one of those ads and I just deleted those other ads and only saved the one with one message or reply from interested buyer.