Many-to-Many mapping is not working as expected

Question

I have two tables USERS(PK: User Id) and TEAMS(PK is Team Id. We have an intermediate table MEMBERSHIP that has two columns (User Id, Team Id) and maintains the relation between Users and Teams.
When we add team A to user ' B' the table(MEMBERSHIP) is updated as expected.
When I retrieve the teams for user B. the team A is part of the list.
But when I get the users for team A, the user B is not part of the list.
If we again try to add user B to team A, we get a unique constraint violation as expected.
Could anyone help resolve this issue?
We have created the below 2 mappings:
1. Users and Teams - > where we have to add teams to the user
<mapping>
<inherited>false</inherited>
<instance-variable-name>teams</instance-variable-name>
<uses-method-accessing>false</uses-method-accessing>
<read-only>false</read-only>
<get-method-handle>
<method-handle empty-aggregate="true"/>
</get-method-handle>
<set-method-handle>
<method-handle empty-aggregate="true"/>
</set-method-handle>
<reference-descriptor>com.pkg.Team.ClassDescriptor</reference-descriptor>
<private-owned>false</private-owned>
<uses-batch-reading>false</uses-batch-reading>
<table-reference-mapping-reference-handle>
<reference-handle>
<reference-table>MEMBERSHIP</reference-table>
<reference-name>MEMBERSHIP_USERS</reference-name>
</reference-handle>
</table-reference-mapping-reference-handle>
<container-type>Collection</container-type>
<uses-default-container-class>true</uses-default-container-class>
<key-method>
<method-handle empty-aggregate="true"/>
</key-method>
<collection-mapping-indirection-policy>
<collection-indirection-policy>
<uses-indirection>false</uses-indirection>
<uses-transparent-indirection>false</uses-transparent-indirection>
</collection-indirection-policy>
</collection-mapping-indirection-policy>
<ordering-criteria>
<collection-ordering-criteria>
<use-ordering>false</use-ordering>
<ascending>true</ascending>
</collection-ordering-criteria>
</ordering-criteria>
<relation-table>MEMBERSHIP</relation-table>
<target-reference-handle>
<reference-handle>
<reference-table>MEMBERSHIP</reference-table>
<reference-name>MEMBERSHIP_TEAMS</reference-name>
</reference-handle>
</target-reference-handle>
<mapping-class>MWManyToManyMapping</mapping-class>
</mapping>
2. Teams to User -> where we have to add users to the team
<mapping>
<inherited>false</inherited>
<instance-variable-name>users</instance-variable-name>
<uses-method-accessing>false</uses-method-accessing>
<read-only>false</read-only>
<get-method-handle>
<method-handle empty-aggregate="true"/>
</get-method-handle>
<set-method-handle>
<method-handle empty-aggregate="true"/>
</set-method-handle>
<reference-descriptor>com.pkg.User.ClassDescriptor</reference-descriptor>
<private-owned>false</private-owned>
<uses-batch-reading>false</uses-batch-reading>
<table-reference-mapping-reference-handle>
<reference-handle>
<reference-table>MEMBERSHIP</reference-table>
<reference-name>MEMBERSHIP_TEAMS</reference-name>
</reference-handle>
</table-reference-mapping-reference-handle>
<container-type>Collection</container-type>
<uses-default-container-class>true</uses-default-container-class>
<key-method>
<method-handle empty-aggregate="true"/>
</key-method>
<collection-mapping-indirection-policy>
<collection-indirection-policy>
<uses-indirection>true</uses-indirection>
<uses-transparent-indirection>false</uses-transparent-indirection>
</collection-indirection-policy>
</collection-mapping-indirection-policy>
<ordering-criteria>
<collection-ordering-criteria>
<use-ordering>false</use-ordering>
<ascending>true</ascending>
</collection-ordering-criteria>
</ordering-criteria>
<relation-table>MEMBERSHIP</relation-table>
<target-reference-handle>
<reference-handle>
<reference-table>MEMBERSHIP</reference-table>
<reference-name>MEMBERSHIP_USERS</reference-name>
</reference-handle>
</target-reference-handle>
<mapping-class>MWManyToManyMapping</mapping-class>
</mapping>

Answer 1

Hi Chris,
Thank you so much for inputs/updates.
"You must put A in B's collection of A's and also put B in A's collection of Bs" we are already handling this in our code.
As per your suggestion i have used refreshIdentityMapResult() method and read only option, after that i m able to see User B in team A.
ReadAllQuery findById = ..
findById.refreshIdentityMapResult();
But if try to remove team A from user ' B' and add same team A to user B then user B is not updating with team A. Please let me know if m missing any mapping/configurations.
Regards
Chandra