You’re looking at it at surface level. You have to imagine the pelvis and rib cage and what they’re doing underneath the skin and muscles. You also have to exaggerate the bean . This is also more or less about gesture so there’s that too

 First one she is leaning a bit towards us on the top, and that lean makes more of and impact than the raised hip on the same side. Although, I feel you could do it either way depending on which one that you most wanted to exaggerate in your drawing. The second one she is also leaning a bit to that right side, but the hip is also sticking out that way too. The hip is making a bigger impact, to me, so in this perspective it seems to make mores sense for that one to be in front. The third is mostly flat but the hip is leaning out a bit towards us so that is the most logical place to exaggerate that turn in the overlapping line. Also her hip in general comes out more. I think it’s similar to how you would draw to indicate her deltoid muscle by wrapping a line in from the contour line to show an overlap. That way you make it clear that the deltoid is sticking out and not just flat with the rest of the arm.

My opinion and I hope it helps. 1) I think the model just has big hips. You can tell she's sticking her top part towards us by the cast shadow created from the top part. The more she leans towards us, the darker the shadow. The fold where her top part meets the bottom part is like a dark line, and in Stan's drawing you can see he marked that fold with a dark line. Looking at her shoulders, you can see they're slanted towards us. If she were level, then her shoulders wouldn't be at that angle. I also think it's possible she could be sticking both her top half and bottom half towards us; but definitely top half it pointed towards us. 2) See how her Camera Right leg is straight and her camera left leg is bent? She has all her weight on her Camera Right leg; which will cause her right side of her hip to be raised. Looking at her bellybutton, we see it's orientated more towards the camera left side of her body; and we see her camera left shoulder is pulled back. The twist of her body, and the way her weight is distributed shows she's leaning back with her camera right hip protruding towards us. 3) I attached a picture to explain it better: I think with photo 3, it's following the gesture/flow of the pose to show the hip as the main focus. Her weight flows and shifts down to her right hip, which is raised (like #2). So, even if it's not she not exactly thrusting her hip towards us, it's where all the weight is bared. Thinking about how gravity is working on the body, helps with the robo bean (just my take). "Well, look at #1. Isn't all her weight on her camera right hip? So shouldn't the bottom half be more of the focus?" In #1, her top half is leaning towards us, so it should be emphasized; but, notice in #1, how the lines on the bottom half are darker? Dark lines grab our attention and emphasize. So he is emphasizing the bottom half, but he's just emphasizing the overlap of the top half more. I think there's also an element of exaggeration of the tilts going on. Exaggerated poses tend to be more interesting. I hope this helps!

In that case you might try to indicate the pelvis form with a convex (vs a concave line as you have it now) to indicate the 3-d shape of the form, which is what the bean is about I guess. The line your asking about might indicate the pose's gesture, but not the form's overall shape

the bean isn't completely anatomical and the line going outside doesn't actually mean something but just to indicate flow and 3d form

I used your first “wrong overlap” bean as an example to explain how you would go about finding the right overlap. The body may seem flat in a picture, but remember you’re looking at 3D forms. I don’t know if you’ve moved on to the next lessons, but the Robo Bean will help you understand that. Also Stan exaggerated his bean by tilting the hips up so we can clearly see that the hips are coming towards us. As for ghosting, I would suggest not overthinking it and just put down marks if you feel like it, you can always draw lightly and then erase with a kneaded eraser if you feel like the line isn’t how you wanted it.