You will get useful File Exchange help here:
https://community.ebay.com/t5/Tools-Apps/bd-p/tools-apps-dbAre you editing and uploading with an iPad or other limited device? I suspect your errors may be due to carriage returns/linefeeds or other file format artifacts that may be a result of not using a standard desktop text editor, or missing/extra quotes , or bad/missing column headers. (but I'm not a FE person -I've only played with it a few times).
Ask dollybeauty or mylkal@ebay in the Tools&apps forum - they'll get it in short order.