Level distance does not seem to have any effect on the 1st node's distance from its children in the MWE below (tried adding level distance and playing with its values at every level, but it works only for the levelX styles):
\documentclass[10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[landscape,paper=ansibpaper]{geometry}
\usepackage{tikz}
\usetikzlibrary{trees}
\usetikzlibrary{shadings}
\tikzstyle{every node}=[draw=black,thin,anchor=west, minimum height=2.5em]
\begin{document}
\begin{figure}[!htb]
\resizebox{\linewidth}{!}{
\begin{tikzpicture}[
supervisor/.style={%
edge from parent fork down,
level distance=2.5cm,
text centered, text width=5cm},
teammate/.style={%
text centered, text width=3cm,
level distance=2.5cm,
fill=gray!10},
subordinate/.style={%
grow=down, xshift=-1.1cm, % Horizontal position of the child node
text centered, text width=3cm,
edge from parent path={(\tikzparentnode.205) |- (\tikzchildnode.west)}},
level1/.style ={level distance=1.5cm},
level2/.style ={level distance=3cm},
level3/.style ={level distance=4.5cm},
level4/.style ={level distance=6cm},
level5/.style ={level distance=7.5cm},
level 1/.style={sibling distance=4cm}
]
% \draw[help lines] (0,0) grid (4,3);
% Supervisor
\node[anchor=south,supervisor]{Supervisor\\Supervisory position\\Location}
[edge from parent fork down]
% Teammate and Subordinates
child{node [teammate] {Teammate1\\Position1\\Location1}
child[subordinate,level1] {node {Subordinate\\Position1\\Location1}}
child[subordinate,level2] {node {Subordinate2}}
child[subordinate,level3] {node {Subordinate3}}
child[subordinate,level4] {node {Subordinate4\\Position4\\Location4}}
child[subordinate,level5] {node {Subordinate5\\Position5\\Location5}}}
%
child{node [teammate] {Teammate2\\Position2\\Location2}
child[subordinate,level1] {node {Subordinate1}}
child[subordinate,level2] {node {Subordinate2}}
child[subordinate,level3] {node {Third\\Teammate}}
child[subordinate,level4] {node {Longtext-\\teammate}}}
%
child{node [teammate] {Teammate3\\Position3\\Location3}
child[subordinate,level1] {node {Subordinate\\two lines}}
child[subordinate,level2] {node {Subordinate2}}
child[subordinate,level3] {node {Subordinate3}}}
%
child{node [teammate] {Teammate4\\Position4\\Location4}
child[subordinate,level1] {node {Subordinate1}}
child[subordinate,level2] {node {Subordinate2}}}
%
child{node [teammate] {Teammate5\\Position5\\Location5}
child[subordinate,level1] {node {First\\Subordinate}}
child[subordinate,level2] {node {Subordinate2}}
child[subordinate,level3] {node {Third\\Teammate}}
child[subordinate,level4] {node {Longtext-\\teammate}}};
%\shade[shading=Mandelbrot set] (0,0) rectangle (5,5);
\end{tikzpicture}}
\caption{This is an org chart}
\end{figure}
\end{document}
What am I doing wrong?
Bonus question: Is it possible to center supervisor's box horisontally?

level 1/.style={sibling distance=4cm, level distance=4.5cm}. Thanks a million! – ajeh Feb 06 '14 at 16:04…/.styledoes overwrite everything earlier defined stuff.…/.append styleinstead adds/appends (sic!) the new definition(s), only overwriting concurrent options. – Speravir Feb 06 '14 at 16:19level 1/.style(with a space between "level" and "1") is the same aslevel=1, level 1; it is a style that is automatically executed at the beginning of each set of children, for the level one in the current tree.level1(no space) is a user defines style that could be manually applied to any desired node. Perhaps the name choosing for the two styles was not the most appropriate, since it might produce confusion. – Gonzalo Medina Feb 07 '14 at 02:27