I... have no idea what is going on in that .cap
I will say this: Resizing physics objects often leads to bounding box problems. This is a known issue.
What I believe is happening is that the bounding box for your, uh, giant bear macro is glitching out. When you change from large to small, the bounding box is still large, and the small bear macro pushes out of solids away from the black platforms.
What I would recommend is that instead of changing the size of your object, you should destroy your physics object and spawn your larger object in it's place, and vice versa. That way you can preserve your bounding box.
In a future build this probably won't be an issue.