Well they are both caster and camber. It "might be" that the bushings are worn, but it's also possible that something is bent or even cracked / broken. You should consider (if you are physically able) to learn to do your own alignments. You do not measure caster. You measure camber, and you figure caster from two different camber measurements. Even camber "gauges" are "in effect" using math.
When you (If you actually can) push the arm out away from the car with both adjustments, you change camber. If you only move one bolt, you change both caster and camber. Why you move the front bolt / cam in such a way as to push the front of the arm out, you change camber, but you also increase caster--you are tilting the spindle back. It is difficult to get "too much caster" on most these girls.
