ADT File reading

Hello,

I've extracted the adt files from wow and i'm trying to read the structure in them. I've some trouble understanding the Field areaID in MCNK. ( https://wowdev.wiki/ADT/v18#MCNK_chunk ) The Header has to be in the .adt File.
But i've really different results for different adts.

For Example:

\World\Maps\Kalimdor\Kalimdor_39_31.adt areaID:815
\World\Maps\Kalimdor\Kalimdor_39_32.adt areaID:815
\World\Maps\Kalimdor\Kalimdor_39_33.adt areaID:17
\World\Maps\Kalimdor\Kalimdor_40_30.adt areaID:14
\World\Maps\Kalimdor\Kalimdor_40_31.adt areaID:4981
\World\Maps\Kalimdor\Kalimdor_40_32.adt areaID:816
\World\Maps\Kalimdor\Kalimdor_40_33.adt areaID:363

Shouldn't this be all 14? It should be Durotar

I'm using 6.2.3.20779 GameFiles.


Did this Field get deprecated or are my Files corrupt? If its the 1. what can i use to get the ADT Files for each Zone? And how does it work if its overlapping?