As a work around I created a new field and I set the default value using the eval function to build a dilimited string of CTIssue values from the main data source repeating table
Default value formula: eval(eval(Control_Table, 'concat(my:CTIssue, ":")'), "..")
If I use this new field in place of 'All Occurences of CTIssue' in the rule (screen shot above) it works. I really don't want to use this approach because it adds another field to a form with a lot already.
If anyone is able to understand why this work around worked, and using 'All Occurrences of CTIssue' didn't, I'd really appreciate it.