Some Basic SM questions

What's the difference between Extruded Cut in SM and Extruded Cut Regular SW part? I find that Ext. Cut in SM cuts away parts almost opposite parts of cut.

You may NOT make modifications or cuts in the flattened state of a SM part. Is this correct?

In an assembly with SM parts you may not use the SM properties. Correct? You should make a config. of part in folded/& unfolded state?

SM does not maintain properties of SM when you have different thicknesses in your part. Correct? Any way around this?

I have tried on my SM parts - bending 1st cuts 2nd

                                           cutting 1st bends 2nd   Neither one of these seem to solve my SM problems.

I have posted several times and have gotten GREAT answers. Still struggling and have not accomplished bending my aluminum panels with a 45 degree cut that does not go thru material. Looked at a YouTube on bending panels with 45 cut exactly what I wish to accomplish hoewever its an 8 sec. clip with no directions strictly visual.

SolidworksSheet Metal