From what I can tell, the codes you have listed here look to be correct.
However, if you have the August 22 Mass Markings (the most common one, and it's a lot of markings), I have heard of markings seeming to recycle themselves in appearance when in-game.
For example, when you install them, what should be a custom marking re-appears as Cubspots, or Cheetah markings, as you specified.
So, it could be that any custom markings you might have might be glitching in your game, though I'm unsure of how to resolve this, other than reinstalling the August 22 markings (or whatever markings pack you currently have).
Or, remove the custom markings from your current markings.cfg file, make the custom markings you want, and then re-add them.
Could be worth a try?