I have a couple of theories on what may be going on.
There's the possibility it's a very low white spider with a wobble. The head pattern makes this debatable, but not ruled out.
It could also be a woma/spider cross. The pictures I've seen of that combo are snakes that show some variability, but very often look just like that, a very low white spider.
Since the spider wobble can show up whenever the spider gene is expressed, it's a distinct possibility that that snake may be a combo. It would explain both the woma look and the wobble as well.
Here's some pics from NERD's site of the spider/woma cross.
http://www.newenglandreptile.com/nerd/index.php/ball-pythons/spider-woma-ball-python.html
I'm largely unfamiliar with the woma gene specifically, but I did notice a comment on NERD's site that said
Apparently there are some motor skills issues with the womas but whether they are only seen in the homozygous form I don't know. I would think "inhibited motor skill" would also be an adequate description of the spider wobble as well so perhaps the two conditions are similar in effect.
As for the whole IBD concern, if you are not returning the snake, I would cull it then have a necropsy done just to rule that out. Personally I doubt that is the issue, but the peace of mind gained from
knowing it wasn't the problem will be well worth it. Then you won't have to harbor any wondering for the next few weeks or months about the however slight possibility that that disease may have been in proximity to your collection.