I was able to resolve it. I had a relationship and was using a boolean to determine the row backcolor. I had to change my code to this:
If e.RowIndex <> 0 Then
If e.RowIndex Mod 4 = 3 Then
e.Style.BackColor = Color.AliceBlue
ElseIf e.RowIndex Mod 4 = 1 Then
e.Style.BackColor = Color.Lavender
End If
End If