If you joint high, it will be hip-py. If you joint lower it will not be as much... but don't go too low or clothes won't fit.
Also, legs are weight bearing, and the doll is top heavy. Everything should be stuffed evenly and firm, not overstuffed, not soft and squishy. Like making sausages. Your first pic - stuffing looks ok, jointing looks loose. Also, I "cover" my button with batting, then safety-pin my button in the leg before stuffing then I stuff a little more on the outside of the leg and not too much on the inside. The safety-pin being in the way helps remind me not to stuff too much. So you could reduce the stuffing as Sharalee said.
Joint tightly, so when it's standing the body and head won't swing loosely backward and forward. I notice your first pic there is a big space between the legs, the bottom of your body seems wide, and jointing seems loose. I believe someone once squished it under their knee in order to joint tight enough.
I used to do that until I realized if everything is stuffed tight and feet are relatively flat, you just need to be snug.
In this pic, this one stands but it could've been done a little higher. I try to pick a spot on the body, put the leg up to it and swivel it around as if attached, to see if it looks good.
Here is a sample of dry fitting. Use pins to hold in place. This one needed to move more to the doll's back before it will stand. If you have a Barbie doll, take a look at placement.
Hope this helps. :-)