Spinner Control Stepping Issue

I have ran into a couple issues with the spinner control where the stepping doesn't seem to be working as anticipated.

If you have a min value other than 0, it gets added to the step.

{step:10,min:03}

value = 50

step up: new value 63, expected 60

step down: new value 43, expected 40

The other issue is double stepping

{step:10,min:0,max:1000}

value = 101

step up: new value 110, expected 110

step down: new value 90, expected 100

value = 105

step up: new value 120, expected 110

step down: new value 10, expected 10

examples: http://jsfiddle.net/MWuf2/3/