Task state problem

[Jousimies]

When an incubate project moved to projects, then sub tasks will add todo state automatically.

But when a project moved to incubate, the todo state does not automatically removed.

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Another thing, for example, I have a project with three two tasks.
the first task marks with NEXT state, and the second one with TODO state.

Now, due to some reason, I change the first task state to WAIT state, org-gtd.el will auto change the second task to NEXT state.

I think the second task need remain TODO state until the first one marked with DONE state.

Any help will be grateful.