Axes doesn't move with parental uipanel ??

I just met something what I don't understand and need help. My Matlab version is 2011b. In my application it seems the axes doesn't move with its uipanel as parent, e.g. with following test code.

Does anyone has an idea?

f  = figure; 
h1 = uipanel('parent', f); 
h2 = uipanel('parent', h1); 
h3 = uipanel('parent', h2); 
axes('parent', h3, 'unit', 'normalized', 'position', [0 0 1 1]);
set(h1, 'unit', 'pixel');

set(h1, 'position', [10 10 200 300] )
set(h1, 'position', [40 50 200 300] )

f  = figure; 
h1 = uipanel('parent', f); 
h2 = uipanel('parent', h1); 
h3 = uipanel('parent', h2); 
axes('parent', h3, 'unit', 'normalized', 'position', [0 0 1 1]);
set(h1, 'unit', 'pixel');

set(h1, 'position', [-100 10 200 300] )
pause(0.1)
set(h1, 'position', [40 50 200 300] )