When I specify a material in the Simulation tree, it makes a new folder for this component/assembly and lists the material there even if it's an already existing material.

1) Is this so I can make a tweak to it and not change the original material?

2) This is my real issue: It changed the ultimate and yield stress in that material data. I was thinking that maybe it converted it to MPa, but the values don't work out. It only changed ultimate and yield, not the modulus or anything else I entered. (This was a custom material.) Even after reselecting the material and rerunning, it still lists the yield incorrectly on the stress plot. It does this even if I go back to the component and select the material there and rerun it (this is a single component analysis.)

3) I can't find where to change the target stress that shows up on the legend in the stress plot in 2015. Is this no longer available?

Anyone know what's up? This was a simple static analysis.

SolidWorks Premium SP1.1

Windows 7 Pro SP1