I've seen the topic of "cropping issues" raised above several times, but it's more substantive than that. These have fundamental posing and framing issues, which are two different, but related, issues. These seated poses are some of the first poses a baby can perform independently...this baby is now old enough to sit up on her own; she has trunk control, and can also perform simple tasks using her arms. In short, she can now "sit up on her own". The poses you are doing however need a bit of refinement from you, the photographer. And then, the camera needs to be framing the shots the best way, to avoid awkward crops and visual tension from trying to cram a baby into a frame that's not oriented quite the right way.
The answer? Simply turn the baby more toward the camera, or even more away if you want to get a profile or an over-the-shoulder profile with her looking back toward you, and turn the camera to vertical. Shot #2 is pretty much what I mean, but it has her foot cropped off awkwardly, and has way too much top space, and the camera height is too high. But the pose is tall, and the frame agrees with the pose.
Shot # 1 *is* a natural logical horizontal, but there's too much top space, causing her to be cut off awkwardly. But the pose and props are wide, and so there is a natural,logical horizontal pose that should be framed in agreement, meaning framed horizontally.
Shots 3,4,and 5 have her head crowding the top of the frame, which causes a lot of tension. In 3,4,and 5, if the baby had been turned slightly, then the camera could have been turned vertically, and she would fit better into the frame, and a "tall" camera orientation would have made three classic "just sitting up" baby poses. The blur effects and the processing would make a good pairing with classic baby poses, which is what these are supposed to be, but the poses needed minor refinement and the camera needed to be oriented in agreement with the body positioning. "Tall portraits" would have allowed her to occupy the longer dimension of the frame, so she would have been bigger, clearer, and placed in a psychologically active "upright" frame.