datagridview delete selected row, but remove two rows

Hello, I am working on database recently, I read data from database and fill in the datagridview. when I want to delete one row selected, anytime I run, two rows will be deleted. Could somebody help me?

my code is as following.

if (dgvRecipeData.SelectedRows.Count > 0)
            {
                dgvRecipeData.Rows.RemoveAt(dgvRecipeData.SelectedRows[0].Index);
            }