This is just the way how Datamolino displays the names of the export destinations. The system always differentiates between two of them based on the sub-folder from which you currently export documents.
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When you export your documents from sales subfolder, data will be always sent to 'Sales' under the 'Account' section in your Xero organisation. This is how Datamolino works and you don't have to be worried that the names of the export destinations are the same.  
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In terms of the sales ledger accounts, Datamolino pulls in this information from your  Xero account. Therefore please review your chart of accounts in your Xero organisation.