NX How to have two different sets of associate objects for stacked PMIs?

If a balloon callout is stacked to another balloon callout, the child inherits the "associate objects" from the parent balloon.
Because of this behaviour, Two stacked balloons couldn't have two different sets of "associate objects" 
How to have two different sets of associate objects for stacked PMIs?

Solution

If you turn OFF "Inherit Associative Objects" in PMI preferences, you can have two different sets of associative objects for the given case.
Please refer the below picture.

Hardware/Software Configuration

Platform: INTL64
OS: windows
OS Version: 1064
Product: NX
Application: PMI
Version: V1973
Function: STACKING

Ref: 002-8566902