Duplicate image error in the save!

My function that saves the images in the folder works correctly, but when I open the folder of the photos the images appear duplicate but with different names Here's the save function:

   protected void btnSalvarImovel_Click(object sender, EventArgs e)

    {
        if (fuFotos.HasFile == false)
            lblImovel.Text = "Por favor selecione uma foto!";
        else
        {
            List<string> nomeFoto = new List<string> ();
            var arquivos = fuFotos.PostedFiles;
            foreach (var arquivo in arquivos)
            {
                string nomeArquivo = arquivo.FileName;
                fuFotos.PostedFile.SaveAs(Server.MapPath("~") + "/Imovel/" + nomeArquivo);
                nomeFoto.Add("~/Imovel/" + nomeFoto + nomeArquivo + arquivo.FileName);
            }

            string comandoSQL = string.Format("INSERT INTO Imovel Values('{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}')",
                ddlCidade.SelectedItem.Value, ddlLocalizacao.SelectedItem.Value, ddlOperacao.SelectedItem.Value, ddlTipoImovel.SelectedItem.Value,
                txtTitulo.Text, txtObservacao.Text, txtValor.Text, txtQtdQuartos.Text, string.Join(",", nomeFoto));


            lblImovel.Text = "Imóvel cadastrado com sucesso!";
            ddlCidade.Text = string.Empty;
            ddlLocalizacao.Text = string.Empty;
            ddlOperacao.Text = string.Empty;
            ddlTipoImovel.Text = string.Empty;
            txtTitulo.Text = string.Empty;
            txtObservacao.Text = string.Empty;
            txtValor.Text = string.Empty;
            txtQtdQuartos.Text = string.Empty;


            try
            {
                conexaoSQL.Open();
                int teste = new SqlCommand(comandoSQL, conexaoSQL).ExecuteNonQuery();
            }
            finally
            {
                conexaoSQL.Close();
            }

            }
        } 

The folder photo:

Beingthatitshouldhavelookedlikethis:

Inoticedthatthebankisbeingsavedlikethis:

Is there anything to see? Would anyone know what might be causing this or how to help me make it? Thanks in advance.