InfoPath Dev

I have a requirement in which i have to copy data from one repeating table to other. In my source repeating table i have a data inserted in a row,every row also has a check box called "follow up",when this checkbox is checked and follow up button is clicked,the checked rows from the source repeating table gets copied to destination repeating table. My problem is  at first time when i m doing this the data is getting populated correctly but when i m adding some more rows in my source repeating table,checking it and clicking on the button again the previously added data is getting overwritten by the new data instead of adding rows in a destination repeating table and getting data populated there. Please pour in your suggestions,any help would be highly appreciated.

As always, this is certainly possible via custom code. If you are writing code for this, please post it in the Code board so people there can help you. Otherwise, you can accomplish all of this with the CopyTable command in qRules.