You're not supposed to use some markings in presets. I'm pretty sure the skeleton marking is one of them, I'll have to check on that... I mean, there are some differences, like the teeth, but it's still basically the same thing.
*Edit
I was right, Skeleton is one of the markings you can't use in presets. nHere is the original post in which it is stated, which is stickied.
I have noticed a few of you using the markings from Ingame for your presets, I made a few of them and I'm not to happy. Here is a list of markings you shouldn't use for your presets,
Feline Body
Cheetah
Cub Spots
Hellion
Jaguar
King Cheetah
Marble
Ocelot
Scar
Snow leopard
Swirl
Tiger
Backleg stripes
Striped legs
Butt stripes
Dorsal stripe
Toeless socks
Feline Head
Cheetah
Cub Spots
Jaguar
King Cheetah
Marble
Ocelot
Scar
Snow leopard
Swirl
Tiger
Simple stripe
Ear rims
Eye stripe
Feline Tail
Cheetah
Cub Spots
Jaguar
King Cheetah
Marble
Ocelot
Scar
Snow leopard
Swirl
Tiger
-------------
Canine Body
Cheetah
Cub spots
Hellion
King Cheetah
Marble
Ocelot
Scar
Snow Leopard
Swirl
Tiger
Skeleton
Husky
Striped Hyena
Spotted Hyena
Backleg Stripes
Striped Legs
Butt stripes
Dorsal Stripes
Toeless socks
Fading spots
Fading stripes
Canine head
Cheetah
Cub spots
Hellion
King Cheetah
Marble
Ocelot
Scar
Snow Leopard
Swirl
Tiger
Skeleton
Husky
Striped Hyena
Spotted Hyena
Simple stripe
Ears rims
Eye stripe
Canine Tail
Cheetah
Cub spots
Hellion
King Cheetah
Marble
Ocelot
Scar
Snow Leopard
Swirl
Tiger
Skeleton
Husky
Striped Hyena
Spotted Hyena
I got word from Kovu, that since there were the markings I made for you guys, I have a right on what happens to them.
Some of you might wonder why you can't use them? To make presets more original, it's would be better if someone saw your preset were you made it all by scratch, not from copy pasting someone's markings into the game.