Trench Problem: maybe a bug?

[Ironfist]

I am not quite comfortable with the first one because the trench extended out of deployment zone can NOT be removed. If you want to remove trench, you can't even click out side deployment zone. So I guess it is a bug.

For the second one, I also think it's perfect okay. Since there is time to dig trench, there should also be time to chop down trees, etc. Maybe a description of this feature should be added in the game guide because it is quite useful.