about number slider, maybe a bug

Well, if i want to set a number slider give integers between 0~2, right click on the slider and set the type as integers, then set the value as "lower 0 upper 2 value 1", commit. Now is the problem: i got a slider give integers between -8~2, as right click slider cannot set the length of domain, and it cannot be smaller than 10 here.
If i change domain before setting the slider type, i can get a right slider. But change the upper to 5, the lower become -5 again. Double click on a slider is working wonderful, but i think right click should be useful as well.