Trouble selecting element's children in class .click() handler.

Trouble selecting element's children in class .click() handler.

I'm running into some trouble trying to toggle the items in a list that are children of the div which was clicked.

When clicked, some of the divs show/hide just their children, while others show/hide a strange combination of all divs in the 'collapse-trigger' class.

https://dpaste.de/62tF