Adding rows to bottom of datagrid view

[catoctinwx]

I have what should be a simple problem to fix.

I am trying to insert an initial line (0) into a datagridview (named params). The program will then read each cell in that row, pass them through a function and return values be placed into the next line (1). This will continue until one of the parameters reaches some set point.

The problem that I am having is that when I try to insert a new line, it appears above the initial one and not below it like I would like it to.

Here's my code so far:

Private Sub HurricaneWinds_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim init_xrange() As Double = New Double() {0.0, 0.0, 0.0, 40.0, 0.0}
 
       
        For i As Integer = 0 To 4
            params(i, 0).Value = init_xrange(i)
        Next
 
        Dim xx(4) As Double
        
 
        For j As Integer = 1 To 10
            Dim prange() As Double = New Double() {CDbl(DragCo.Text.Trim), CDbl(WindVelCoef.Text.Trim), CDbl(WindVelExp.Text.Trim), CDbl(Gravity.Text.Trim)}
            Dim xrange() As Double = New Double() {CDbl(params(0, j - 1).Value), CDbl(params(1, j - 1).Value), CDbl(params(2, j - 1).Value), CDbl(params(3, j - 1).Value), CDbl(params(4, j - 1).Value)}
            xx = rk4(CInt(NumTimesteps.Text.Trim), CDbl(TimeStep.Text.Trim), xrange, prange)
            
            Dim item As New DataGridViewRow
            item.CreateCells(params)
            With item
                .Cells(0).Value = xx(0)
                .Cells(1).Value = xx(1)
                .Cells(2).Value = xx(2)
                .Cells(3).Value = xx(3)
                .Cells(4).Value = xx(4)
            End With
            params.Rows.Add(item)
           
        Next
 
    End Sub

And a picture of the problem:



Any suggestions?

Thanks