Driver's ED students and roundabouts... should these two ever be combined?

This has turned out to be the week from HELL!! Besides my insane PTO schedule and not being at all prepared for club on Saturday, last night I was in an accident. I was in the roundabout... in the left hand lane... and a driver's ed student was in the right hand lane. Well, my arrow clearly allows me to exit the roundabout or continue through it. The other arrow clearly says that the right lane can only exit the roundabout. Long story short... the girl that crossed into my lane and hit me was not sited for this accident. They claimed that they were allowed to continue around the roundabout from the far right lane. Maybe the paint on the road is wrong? I doubt it, personally. The police officer, whose name is Alan Jackson (not joking), said that it was my fault because he thought the arrows were incorrectly painted on the road and I should have yielded for her. Why would I yield to someone driving along side me going the same direction in a two lane road? Can you believe this? Either way, I followed the posted signage and she did NOT!! We are absolutely taking this further. Leif is going to the police station with photos in the morning. There is nothing in our current driver's ed manual about roundabouts. The teacher in the car said that there was... HE IS A LIAR. I am still a little angry about the whole thing. I feel that all that girl learned was to be dishonest. Did I mention that an eye witness said that I stayed in my lane and that the other car crossed the line and side swiped me? Oh, and the driver's ed teacher picked the debris up thus disabling the officer from see the exact location on the road where impact occurred. Okay, I will stop ranting now. What do you think?