i had this problem when i bought the deflex ones,dont know about the polysport ones but the inner bush on the rear arm was too small,i thought you left the oe sleeve in but seen on other cars that the sleeve is taken out,got back onto deflex and explained the situation and it seemed that the old bushes(which retained sleeve) had been mixed in size with the new bush,so i got diameter of old bush with length of the new bush(if u get me)anyway they sent me a new set out,maybe worth gettin rally design to send another set see if they are the same