Your not setting right if you have so many snares knocked.Make sure your snare is not set too far to the left or right.
Another very important tip is to face the way the rabbits are going(ie,with your back to the wood,hedge or where ever the rabbits are coming from) or your snare wont be square to the run.If its grass keep your wires at 51/2".Dont blame hight for bad snare positioning.
Make sure you find at least three beats in a straight line and set the middle beat.By doing this you now the rabbit is hitting the middle beat as straight as possible.
Dont put too much tension in your snares