populating datagrid error

[amber]

Hello,

I am having trouble with a datagrid.
I received help online to create the datagrid the way I needed it, so I'm
not entirely clear on how/why it works.

I use the following code to populate the rows of my datagrid.
The variable _arrstr contains my column headers.

For i = 0 To (_dataset1.Tables(0).Rows.Count) - 1
dataTable.LoadDataRow(_arrstr, True)
'column 1 - Cutting Permit
datagrid1(i, 0) =
_dataset1.Tables(0).Rows(i).ItemArray(1).ToString( )
'column 2 - Cutblock
datagrid1(i, 1) =
_dataset1.Tables(0).Rows(i).ItemArray(2).ToString( )

'etc for all my columns.
Next i

For the most part this works great.
I run into a problem when:
I have a combobox that provides a filter, and a button that when pressed,
populates this datagrid, based on the filter.
The first time I select a filter, then press the button, this works fine.
If I change the value again, and press the button, the correct rows display,
but additionally, for each row displayed, the values of _arrstr populate a
row after that.
So if there should be 4 rows of data, there are, and there are 4 additional
rows containing my column header information.

I'm not sure where this problem is coming from...

Any suggestions??
TIA,
Amber