I am using free Jitterbit to load files (.csv) from SFTP into Salesforce (custom object). In FTP, xls files are fed and is converted into .csv file (via php) and that csv file is inserted into Salesforce. During this process, duplicate records are being inserted. For example, if that xls file has got 100 records, then number of records being inserted into Salesforce are 200.
I did manual testing, wherein, I took the xls fiel and converted it into csv file and kept in FTP. Apparently, there are no duplicates found.
Would like to know what could be happening during this process.