Repeating table creates a duplicate entry of the last node into the first position, Infopath

The problem I'm having is that the last node in a repeating table is duplicated into the first position of said table eg:

• 3


• 1


• 2


• 3

I've got a statement that deletes this node:

   //OrganismResults is the repeating group
   XPathNavigator xpDuplicateOrganismNode = xpNav.SelectSingleNode("
       /my:myFields/my:OrganismResultData/my:OrganismResults[1]", NamespaceManager);

   xpDuplicateOrganismNode.DeleteSelf();

However, I have a repeating table within a repeating table that is creating a lot of duplicate data. Is there an easy way to prevent this from being created and therefore deleted?