datagridview with seperate comboboxes + checkboxes, opening text file

I have 1 datagridview, 5 comboboxes, and 2 checkboxes. The comboboxes and checkboxes are separate from the datagridview; think datagridview with some options off the side of it. It is a 17x4 datagridview and it needs to stay that size. I have got them all saved to the same text file in the order and format that I need. Now I am trying to open the text file to those things specified above.

I got the datagridview information from the text file displayed correctly, that's if I leave the comboboxes and checkboxes out of the text file. When I add the comboboxes and checkboxes they just tack on some new rows to my datagridview.

Here is my open dialog code. I'm thinking I need to specify the sections then tell what line needs to go where, but that is where I get lost.

    private void labelLoad_Click(object sender, EventArgs e)
    {
        filldata(); //datagridview constructor
        dataGridView1.AutoGenerateColumns = false;
        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {
            System.IO.StreamReader file = new System.IO.StreamReader(openFileDialog1.FileName);
            string[] columnnames = file.ReadLine().Split(',');

            DataTable dt = new DataTable();

            foreach (string c in columnnames)
            {
                dt.Columns.Add(c);                    
            }
            string newline;
            while ((newline = file.ReadLine()) != null)
            {
                DataRow dr = dt.NewRow();
                string[] values = newline.Split(',');
                for (int i = 0; i < values.Length; i++)
                {
                    dr[i] = values[i];
                }
                dt.Rows.Add(dr);
            }
            dataGridView1.DataSource = dt;

            //string comboLoadTimeOutTime = file.ReadLine();
            //string comboLoadPreAlert = file.ReadLine();
            //string comboLoadSquelch = file.ReadLine();
            //string comboLoadMic = file.ReadLine();
            //string comboLoadVoice = file.ReadLine();
            //string checkLoadBattery = file.ReadLine();
            //string checkLoadBeep = file.ReadLine();


            file.Close();
            panelCreateRadioSettings.Visible = true;
            panelSources.Visible = false;

            for (int i = 0; i < dataGridView1.Columns.Count; i++)
            {
                dataGridView1.Columns[i].DataPropertyName = dt.Columns[i].ColumnName;
            }
        }

        else
        {
            return;
        }

    }

my text file is like this:

name, name, name, name
1,,,
2,,,
(all the way to...)
16,,,
120 (`comboboxes` start here)
off
4
high
normal
1 (`checkboxes` start here)
1