Thumbs not going pass each other?

[somewebmedia]

Is there an option for the thumbs to not go past each other in the opposite ways?

Also, let's take this example, if I have 0 - 100, with the step of 10, it would be nice to be able to set that the thumbs can come close to each other by the length of the step, and not go any further.

| - - - - | - | - - - - - |
0        50  60         100