If the lines are part of the custom door leaf object, then you would rightly expect them to show for the 2nd door if they work for the first one.
But I am wondering if in the process of mirroring (MUL) and relocating for the 2nd door, the lines are somehow being moved from their original position.
Barry.
Versions 6.5 to 22
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision M6800 - i7 4700MQ @ 2.40GHz, 16GB RAM, AMD FirePro M6100 (2GB), Windows 7 64bit