Data export quality is total garbage
This error does not appear to show up for contacts which have already been synced with iCloud.
If all you want is an alphabetical list of contacts with mostly correct data, and you don’t want to mess with Apple’s Numbers software, this works fine.
Otherwise, Pro version is not worth $10.
Redeeming quality for the free version is you can see recently added contacts chronologically within the app. But unfortunately the pro version will not allow you to export a csv file of contacts ordered by chronology. Lame.
Response from developer
We have fixed the issue you reported regarding the errors in new contact entries. Please update the app to the latest version, and let us know if you encounter any further issues. Your feedback is invaluable to us, and we are committed to improving your experience. Thank you for your patience and understanding.