When much younger and a much more naive about recruiting practices, this happened to me. I went to an interview, the interviewer started asking me a bunch of Novell server question, and I got confused saying I didn't really know that. They indicated it was on my resume, I asked to see it, pointed out that it wasn't my resume (and showed a bunch of subtle formatting changes) and the interview was quickly over. I angrily called the recruiter on my way out and that was my last dealing with them.
(TEKsystems in Southfield, MI, for what it's worth. But this was also 1999-ish.)
I've since found out that it's a pretty common practice and usually the candidates play along just to get the job.
There have been stories of recruiters adding in stuff you never worked on before as well.
For example, I've had recruiters add in stuff like "2 yrs exp in PHP" when the closest I had gotten to PHP then was editing Wordpress to make it work like it should.
Sometimes it was just adding a cover page - that's fine.
Other time they'd edit my contact info out, change wording, stuff like that. I'm not happy with edits being made without my approval, so I stopped giving them an editable format.
I never saw anything super egregious like lying about skills - but that's not to say it never happened.
