When a cell in collection is deselected, its not reflected in the selected row of the Data service

I am using a collection widget to mimic a list function. The data i show in each of the cell is name of the item, state date and end date. Based on the number of selections from the collections im calling another service which will show sub items belonging to all of the items selected through the collection widget. Allow selection and Multi select are both checked. On the click over any cell, the value is being passed through the selected row. But as soon i click on the same cell to unselect the data from the selected row remains the same. Ideally it should go back showing no output since i have unselected the cell. I guess this is a bug with the widget. If there is any solutions kindly let me know. 

-Sachin