Sliders and Layers

So is the purpose of the layers only to show the different options of where the sliders can be set? I was envisioning the layers showing additional information based on the setting of the sliders.

As to your third point, that's fairly easy. Build two sliders on top of each other, each with its own variable. Add this trigger: "Set VariableA to VariableB when VariableA changes if VariableA >= VariableB"  and this one: "Set VariableB to VariableA when VariableB changes if VariableB <= VariableA". That will keep them from crossing.

To keep them .5 apart: "Set VariableA to VariableB when VariableA changes if VariableA >= VariableB", "Subtract .5 from VariableA when VariableA changes if VariableA = VariableB"    and these: "Set VariableB to VariableA when VariableB changes if VariableB <= VariableA", "Add .5 to VariableB when VariableB changes if VariableB = VariableA".