every time u clic on a working site the sliding bar moves +1 to the left … as a result if u check ur sites often u wont farm any stone cause the bar with totallly slide to the left collecting only wood.
i would like to edit this post to ADD a new similar feature i noticed, : On advanced hunter huts, clicking on them sets automatically the traps number to max. something weird is happening with the buildings sliding bars when u select them