Explain This

Messing around with swept cuts, i ran into a situation wherewhen the cut intersects itself, it doesnt cut and in my casecreates another solid body. yes i do know that it gives me theoption of which bodies to keep, i just find the process lessintuitive. i would think that a cut would cut everything in itspath, and not act as it does when the cut overlaps. What doeseveryone else think?SolidworksSketching