[Zope] namespaces

[Kent Polk]

In the following example, "columns" is a method that returns the 
list of columns wrapped in a Results object. "col2" is the name of
one of the columns. Line 3 and line 5 provide the correct answer.
Line 6, however is looking at the columns namespace to render the
results and there's no data there.  

1: <!--#in table-->
2:  <!--#if sequence-end-->
3:   <!--#var "_['count-col2']"-->
4:   <!--#in columns-->
5:     <!--#var "_[colname]"-->
6:     <!--#var "_['count-'+colname]"-->
7:   <!--#/in-->
8:  <!--#/in-->
9: <!--#/in-->

1) Why are "_[colname]" and "_['count-'+colname]" given different
namespaces?

2) how do I get "_['count-'+colname]" to have the table namespace
instead of the columns namespace?

Thanks