I very much doubt you would wear out shimano cleats in a month, I had a pair for years that were used solidly for ages and scrapped on the ground walking alot while couriering and were fine. Also knew someone who wore his until they fell off as the heads of the bolts wore away. Can't imagine they were working that well by then though. I also had the same problem after a while and it was definately me twisting my feet while braking, it was just a bad habit I picked up and couldn't loose, changed to clips and straps which has been fine since.
I very much doubt you would wear out shimano cleats in a month, I had a pair for years that were used solidly for ages and scrapped on the ground walking alot while couriering and were fine. Also knew someone who wore his until they fell off as the heads of the bolts wore away. Can't imagine they were working that well by then though. I also had the same problem after a while and it was definately me twisting my feet while braking, it was just a bad habit I picked up and couldn't loose, changed to clips and straps which has been fine since.