That corrupted layout occurs only if you use the "custom field, stockable variant" plugin. Right? Otherwise, everything works just normal. Am i correct?
If this is your case, we are aware of it. The fix for this issue is on the way and it will be ready any minute today or tomorrow. It requires little hard code in some PHP file, it can't be done through CSS, because if you do it through CSS then this time the normal one (when you don't have "custom field, stockable variant" become corrupted..
Regards.