First, have a read of this post and my response; https://forum.dangerousthings.com/t/dnfc-and-password-protection
The important thing there for you is the last couple paragraphs where I talk about how badly other NFC software is written. In your case, the “formatting” that was done was not done correctly and NFC Tools is not properly detecting tag size. It’s not even reading or respecting the CC data written to page 03 which tells the NFC reader device the size of the tag it is reading.
Download our Support Tool and run the Blank NDEF process on your xNT. That should clear your NDEF record and let you try writing a full record.