Dear Tomas,
My apologies for this, I realized that the problem resides in the way the vCard NDEF is being created by our TagInfo app from a QR Code. Thank you for the bug report, I already addressed a ticket. Unfortunately, I'm not able to give you a date for an app update with this issue fixed.
I don't know If you have checked the following document where VCard NDEF is explained along with an Excel example.
https://inspire.nxp.com/tagwriter/tag-writer-user-manual.pdf
As you might be able to realize, in section 6.2 where the datasets template is shown, specifically in the fourth subsection; Each Colum should have a field from the card information. This .csv file should be copied to your phone memory and by that way, you would be able to write each entry in your Tag. This is more explicit in the NFC TagWriter User Manual from the link above.
Thank you for letting us know about your findings and share them with the community, we appreciate the effort.
Best Regards,
Fabian