Adding on here,
There has been some similar cases when it came to the markings that either will show up the same or some simply just won't show up at all depending on models or just period.
Do make sure that you're downloading the correct markings pack and placing the markings into your 'markings' folder..
Windows C >> FeralHeart >> Media >> Textures >> Markings and then replacing the .cfg file that's located in the main Feral-Heart Folder.
Windows C >> Feral-Heart
Below is the Markings Pack that most players seems to use. You try giving it a go. c:
> Legendary Markings v4.1 < (http://www.mediafire.com/file/67rf541rkh7051i/Legendary+Markings+v4.1.zip)
Good Luck ~!