Get rid of the stakes. It started somewhere and every one has kept doing it. Never placed my foot on a stake when I shoot any other time in all of life (neither hunting or practice!).
There is no need for a stake. No other sport; i.e. baseball, basketball (freethrows), golf, bowling etc. has a stake to place your foot on. No target archery range has a stake to put your foot on. One of the keys to good shooting in any of these sports is foot placement- why touch a stake? Just have a ribbon hanging from a tree, a 3' hoop on the ground, a line, or even standing within 12" of the stake. What difference does it make- let a guy stand, kneel, sit or whatever and shoot the way he always practices and hunts.
My 2C
Dan