Duplicate entries in RoboHelp HTML v10 (Redux)

I've done some searching through the forums and there have already been a variety of posts related to duplicate search results in a .chm when generated with RH. I've followed the instructions from other posts, so far I have:

1) Created a copy of the project, renamed the .cpd file and reentered into RH.

2) Checked for any topics linked to above the main directory and none exist. Neither the hyperlinks in our help pages, nor the hhp files have any references beyond the root.

3) Removed any old .chm files from anywhere but the standard build location (ssl). We were originally building to the root directory of the project, but that has now all been removed so for all intents and purposes the ssl folder is a brand new build folder.

4) Created a new layout (which was used to target the sll build folder).

All of these solutions have failed to fix the problem, so I'm beginning to wonder if it's something different. One difference between my and others' problems in the forum is the second result does not return a page not found error, but rather links correctly to the page. The only difference between the duplicate results is that the second page always has a breadcrumb that links directly from the mainpage to the subject. So clearly the help generator found a functioning duplicate link inside the project directly from the mainpage to all the pages in our project, but I'm at a loss as to where it could be finding these references. Any help would be appreciated! Thanks.