Curious about this too.I have a pair of shoes that has this same issue but were bought on clearance so I didn't have an option to return or exchange them. The same questions crossed my mind. For what it's worth, I have not noticed any problem in comfort, walk, or posture with my shoes--the soul rests flat when I'm standing in them. They have not "re-balanced" after use, though. It would be helpful to hear from someone with more shoe construction knowledge.