[ADF] stetching/shrinking PanelBox to match its content weird

Question

On my page I have two panel boxes.
Altrough thay has similar content (tree) - for some reason top is much bigger then the bottom one and do not change its height according to its content.
Second panel is working good, but it stretching to some limit.
I need both Panels to have minimal height, stretching according to its content.
How to?
Screens to discribe:
[pic1|http://imageshack.us/a/img233/2465/pic1yfc.jpg]
[pic2|http://imageshack.us/a/img692/8352/pic2bk.jpg]
Page code is:
<f:facet name="first">
<af:panelStretchLayout id="psl2" endWidth="300px">
<f:facet name="center">
<af:panelFormLayout id="pfl1">
*....read-only form here*
</af:panelFormLayout>
</f:facet>
<f:facet name="end">
<af:panelStretchLayout id="psl3">
<f:facet name="center">
<af:panelGroupLayout layout="scroll" id="pgl2">
<af:panelBox text="PanelBox2" id="pb2">
<f:facet name="toolbar"/>
<af:tree ... styleClass="AFStretchWidth">
*...tree code here*
</af:tree>
</af:panelBox>
<af:panelBox text="PanelBox1" id="pb3">
<f:facet name="toolbar"/>
<af:tree ... styleClass="AFStretchWidth">
*...tree code here*
</af:tree>
</af:panelBox>
</af:panelGroupLayout>
</f:facet>
</af:panelStretchLayout>
</f:facet>
</af:panelStretchLayout>
</f:facet>

Answer 1

Thank you for pointing. My bad.
The problem was solved by setting PartialTriggers of panelBox to its content tree
but now I have anoter trouble, its not connected I think, but...
If no data in TreeModel of tree, I get doubeling of "No data to display". So my tree is looks like
No data to display
No data to display
On refresh it writing "No data to display" and then for a half of second i get hint like "Gethering data" and then second "No data to display" appears.
What it could be coused by?