Repeating Event nodes not initially set as children under Node Hierarchy

Issue Summary

When I attempt to create a repeating event and assign it a parent node (under Node Hierarchy), the first instance of the event is set as a child node the way it is supposed to, but every subsequent node has no parent node assigned. If I go in and edit one of the other nodes in the series and set its parent node, it then sets the rest as well, but it should assign the parent node of all of the subsequent events originally.

I am using Drupal 5.7, Event Repeat 5.x-1.1, and Node Hierarchy 5.x-1.1. Thanks!