Cool. Thanks ohrenkino. I guess there are some things this awesome program can't do. I understand why. I guess I could use your method and toggle the filter on and off, going through each file one by one.
What I have done is filtered to find the most common segue partners (in this case a song called I Know You Rider) using:
%title% HAS "China cat" OR %title% HAS "Rider"
Then I create the groupings with those partners, as they are easy to pair being that they follow each other. Once the grouping is done, I use:
%title% HAS "China cat" AND %GROUPING% IS ""
Which filters out the pairs I just made. Then I can use ohrenkino's method toggling on and off to find the other partners.