grid grouping does not group element with same name

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What steps will reproduce the problem?
if list of object does not have sorted data then i am seeing multiple group of 
same name.

What is the expected output? What do you see instead?

distinct grouping

Which struts2 version?

2.3.16.3

Which struts2-jquery plugin version?

3.7.1

Please provide any additional information below.

i have query like this select appName,roleName, mydate,name from tbl order by 
mydate 
then the grouping is like this

app1
--------------------------

app2
------------------------

app1
--------------------------

app2
-------------------------

then if i change my query to 

i have query like this select appName,roleName, mydate,name from tbl order by 
appName

then grouping works fine.

Original issue reported on code.google.com by aghaal...@gmail.com on 30 Jun 2014 at 6:53