As you left the screenshot in your post, I deleted it to protect the owners of the email addresses. Luckily it was an image which means they would have to be extracted manually, but still. Better not to put this on the internet.
There is no attached file to this post.
Can you show how the structure of your CSV file is?
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Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.
here is the structure of the affected files.
I do not understand why on limesurvey see. : SURNAME / NAME / E-mail and then
firstname / lastname 7 organization etc. .. etc. ...
The structure of the attributes is different!
Thanks you are very polite