Remove instance of row in section

I have tried everything that I can think of to get the Remove Instance button to work to remove the CURRENT instance but I can't figure it out.

Basically I have a table with a section.  Within this section I have one row that the user can add more instances of. I added a remove instance button but it acts erratically and I can't get it to remove the CURRENT instance. Sometimes it deletes the first instance..sometimes the last instance in the repeating section...it's all over the place and I can't figure out why.

Code for Remove instance button: 

this.resolveNode('PackageSection._ItemRow').removeInstance(this.parent.index);

if (xfa.host.version < 8) {

  xfa.form.recalculate(1);

}

Hierarchy for table:

Page1>

   Column2Subform>

         Table1>

              PackageSection>

                               ItemRow (this has a cell subform with the add/remove instance buttons)

Any guidance would be appreciated.  Link to actual form:  Untitled3Sample.pdf