The recruiter is an idiot who doesn't really know the hiring requirement of his/her employer, which is exactly the job he/she is supposed to do. Simple as that. I marvel at people who can spin it as the student's bad communication. Maybe you communicated your way to your current position? The recruiter is tasked with a job to find appropriate candidates, and is apparently failing. If it were to happen in my company I'll just fire the recruiter on the spot.
The lesson that should be learned: HR should have some technical background to do technical hiring.