If I am a California Resident going to school and working in Oregon? Do I file CA taxes and OR non-residence taxes?

My Federal W-2 box 15 is blank and box 16 is blank but box 17 has a State Income Tax.  

I did receive two state W-2s - 

1) CA - boxes 15 & 16 are completed but no box 17 State Income Tax

2) OR - box 15,16 & 17 are completed

Last year same employer W-2 only contained OR W-2, this year it is so confusing.