I am an Night Elf Hunter (level 9) and have just started Skinning and Leatherwork.
It seems quite straight forward at the moment exept for one thing. I have read you can make light leather out of 3 ruined leather scraps. But I have no option (or cannot see an option) to do this. I have no problems converting the light leather into the kits, but I am stumped on the scraps bit.
Do I need to be a certain level? do I need a certain tool?
I believe you should already know that once you pick up the trade skill.. If anything, go to a trainer, and see if they'll teach it to you (I imagine you should know it though).. Or if worse comes to worse, drop your trade, and relearn it again..
There's a scroll bar on your recipe list for leather working. It's possible that the option to make light leather is off the bottom of the screen so you need to scroll to see it.
That's the only reason I can think why you wouldn't have the skill. I'm pretty sure that it's one of the skills you learn automatically.