I am trying to build an assembly where some swing clamps are used in pairs and the clamp element is angled from the centreline by 15°. I have set up two configurations and I am using an angle mate to produce the angular offset. However, no matter how many times I set the angle in the mate properties window to "this configuration only", the angular displacement remains common across all configurations.

I am using Solidworks 2015 SP2.0

Many thanks

Bob