Another subtle change within the new R2 release (only available to active subscription customs) affects Shaft Openings. These now assume a Base Constraint equal to the associated level of the view you create it in. They also changed the order of the parameters so they are the same as the parameters as other elements that have a Base Constraint, Base Offset, Top Constraint and Top Offset.
The settings we see above are the result of creating the shaft in the floor plan view for Level 1, before I extend it any higher. If you create a Shaft Opening in a 3D view it will assume the Base Constraint of the view's active work plane.