There are jobs that let you use multiple skills. I do a wide range of tasks because of my skillset, though I was hired to do only one of those things. It was just a natural progression of the job and taking on new responsibilities.

One framework I think is helpful is this: http://www.iwillteachyoutoberich.com/blog/ask-ramit-how-do-y...

Talking with people about what a job actually entails, versus what the job posting says it does, seems really obvious when you say it, but sometimes obvious things need to be said. During my last job search I actually talked with people on my options, and found it extremely insightful between what I thought the job was and what it actually is.