I have created the RDLC report with one page, and it shows like that in the Report Viewer too:

But whenever I select to save as a PDF, it duplicates that page:

I have tried changing the size, removing all variables, but nothing seems to work.

Here is the code used to generate the report:

using Microsoft.Reporting.WinForms;
using System.Data;
using System.Data.SqlClient;

namespace MediniApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        SqlConnection con = new SqlConnection(@";");
        
        private void button1_Click(object sender, EventArgs e)
        {
            con.Open();
            SqlCommand command = new SqlCommand("select * from Owner",con);
            SqlDataAdapter adapter = new SqlDataAdapter(command);
            DataTable dt = new DataTable();
            adapter.Fill(dt);

            reportViewer1.LocalReport.DataSources.Clear();
            ReportDataSource source = new ReportDataSource("Owner",dt);
            reportViewer1.LocalReport.ReportPath = @"C:Report1.rdlc";
            reportViewer1.LocalReport.DataSources.Add(source);
            reportViewer1.RefreshReport();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
        }
    }
}