Problem with creating functional view

Question

Hello, I have two object types / classes called: MainPhase and SubPhase. I want to create a view that sorts SubPhases by MainPhases. I want the structure of the view looks something like this: 
 
 MainPhase1 
 
 SubPhase1 
 SubPhase2 
 SubPhase3 
 SubPhase4

MainPhase2
 
 SubPhase1 
 SubPhase2 
 SubPhase99 
 SubPhase98

But the structure of the view actually looks like this: 
 
 MainPhase1 
 
 SubPhase1 
 SubPhase2 
 SubPhase3 
 SubPhase4 
 SubPhase99 
 SubPhase98

MainPhase2
 
 SubPhase1 
 SubPhase2 
 SubPhase3 
 SubPhase4 
 SubPhase99 
 SubPhase98

In some cases MainPhase shares SubPhases with another MainPhase. I want to find all these SunPhases at once when i search for: SubPhase = SubPhase1 for example. 
 Does anyone know how to create such a view? Help is much appreciated! 
 Br, Vesa

Joonas Linkola · Answer

Are the MainPhase and SubPhase separate object types or are they different classes of the same object type? How are you linking the SubPhases to the MainPhase? Is there for instance a property "MainPhases" on the SubPhase object? 
 In my quick test with Project and Task object types, where each task can be related to multiple projects, the view behaved as it should: I could first see the list of projects and then only the tasks for that project under each project virtual folder.

Here are my view settings:

Problem with creating functional view

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