I like what they tried to do with both of them, but I thought the execution was a bit off myself. For the inflation one, I noticed the same exact thing... and my best guess was there's an invisible boot pressing down on her stomach right there.
As for the other, the sample bar is in the way a bit to see exactly what's going on down there. However, in my experience, eroge companies are the worst offenders when it comes to censoring on dakimakura covers. They try to push the limit for what they can show, but they don't want to go too far; this can result in some truly awful decisions.
I don't mind what I like to call "creative censoring". Things like strands of hair/cloth, fluids (like the covers Zengar posted on the previous page), or what have you, covering up the greater details of the goods while still being highly suggestive. I've seen several covers try to go for this middle ground (not fully clothed, but not too many details like a Marks cover) in the wrong way.
The two worst cases I've seen are:
Mosaic censoring on the actual cover. The details are there, but under a very large mosaic. I almost would have preferred the chick to have some panties on.
Smoothing the area out. Like a Barbie doll. You actually see this on a lot of covers to some degree, but they'll usually have the aforementioned ribbon or hair strand directly in the center. There isn't any detail to the sides of the obstruction, and obviously you can't see anything under it. But that's not so bad. I've seen a few cases that gave you an absolute clear shot of the nether region, with nothing to stand in its glorious way, only to be greeted with a smooth patch of skin.
Example: