InfoPath Dev

Hi I am having cascading dropdowns and in the form and i have a button where on click i am retrieving the data and binding couple of entries and also binding the cascading dropdowns also. So over here in the 2nd and 3rd dropdowns the items which is selected is duplicated. Can any one please help me in fixing this issue.

You can filter it out. On the dropdown properties, check the filter button and specify a filter so it is not equal to something that has already been chosen. You can also check the box to avoid duplicates. Easy stuff.