I currently do not have a third party mesh payware.
Then you have another non-mesh scenery which is interfering. That default house in front of the terminal in the 3rd screenshot clearly indicates you have another scenery in conflict.
This of course is not a problem of KDFW, but a problem caused by another product. The most likely causes of conflicts are AFCAD files supplied with AI Traffic products like MyTraffic or similar, which contains files that must NOT be used if you have a 3rd party airport addon: they are supposed to enhance the default scenery but, they always cause problems.
Use the free FSX Airport Scanner utility program to find and remove AFCAD duplicates for KDFW: