i guess you mean one leg is shorter than the other. go to the cobbler for height extension of your shoe. how big is the difference?
no offence but i am wearing a different brand arched-shoes. just to share with those with foot/back problem here, i have this hereditary bunion growth inherited fro m my mother and all the females in the family have this bunion.

having a small flat feet, walking wears me out easily. arched slippers could reduce the exhaustion and pain but i believe weight is also a factor. watch your weight so that your feet doesnt have to withstand more burden
take good care of your feet. before sleep, rest your legs with your feet higher than your knees, dip in warm water and dry them, go for foot massage, do pilates^^