When I Tries To Bind Two Datatable To Single Crystal Report I Get Multiple Entries Of Same Record

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C#

i am using window form application i want to display data from two datatable i a single crystal report i have used :


mr.Database.Tables[0].SetDataSource(dt);
mr.Database.Tables[1].SetDataSource(dt1);

crystalReportViewer1.ReportSource = mr;

but i get duplicate record of entries of database in crystal report dont know why is it happening.

also i wanted to substract sum of two groups means i have made a column Status by Inoder & Outorder. now Inorder entries are placed in a group and outorder in a group while i applied grouping for Status Column in Table for crystal report . now i want sustract sum of Inorder Entries And Outorder Entries which is Grouped By Status pls tell me how to achieve this