The field of User Experience is very broad. All confusion about UX job titles comes from that. It is not just UX titles but the whole profession.
Many times, when companies looking for UX person, they don’t know what they are looking for and expect that responsibilities of whole UX field will do one person.
It’s like expecting of a person with mechanical engineering degree to know every possible specialisation in that field.
Also, companies with no prior UX experience, think they need it all. Although I am afraid that they might be afraid that they’ll get person who won’t be good fit for the job.
There are a lot of titles in UX. Specialists can devote whole life to once facet of UX and still have a lot to learn. For this reasons, it is almost comical when they write a job ad for UX designer. They obviously don’t know what they are looking for.