Pinion angle question

Ok problem solved! My angle finder is fubar! I measured twice again on my original rearend got the same as yesterday. So with the tool still attached I started twisting the axle. I moved it a good three inches and the needle never moved at all. So I guess I will buy a new one and start over. I got the new rear set up on blocks and tried it and I get two different readings on the pinion without moving the pinion at all. I can move it from one way and flip it around and get 6 degrees difference without moving anything.

They make really good angle finder apps for your smart phone if you have one.