UX Designer or UI Developer?

I am currently looking for a new UX Designer position and I'm seeing more and more positions where html/CSS is needed but it's not a development position ("UI/UX Designer"). I am also not seeing Javascript required along with that.

The part I'm confused about is that even if I can create interactive prototypes with HTML/CSS they are not going to be at a level that a front-end engineer would code and are not going to reflect my designs very well without Javascript/jQuery/Ajax. A tool like Axure for example can do the job much better for a designer than coding. So what's the story? Is there a use for htms/CSS as a designer that I'm not aware of? are these development positions in disguise? are companies trying to turn their UX designers into front-end engineers without paying engineering salaries? where do you draw the line between UX Designer and UI Developer?