Hi and thanks for the csv file and system information. Can you please confirm you’ve reviewed our Testing for conflicts guide? Additionally, please review this CSV Importer: Fields and example files KB article and make sure you’re following the proper instructions.
If all else fails and you’re still experiencing issues, please respond back with the step-by-step process you’re doing when encountering the issue. Thanks again for sending over that info and I look forward to getting this resolved. Take care!