Unlinking Integrated Connections 

For Brief 2 apex connection, this has become unlinked from the member end and is operating as a standalone connection (having retained perhaps some information forma previous link). The drop list of loads cases has only one case.

For Brief 3 apex connection it is linked to the wrong end of the analytical member near the apex.

The fix for both is it relink the connection using the 'Apply mode' which you are likely familiar with.  Select brief , go into apply mode, then click at the analytical member end near the apex to establish/correct the link. Make sure to go back to 'Find Mode' (binoculars to right of apply) after this to avoid unintentionally applying the brief to other member ends.

Corrected. 

You can also see from the drop list of load case in Brief 2 has now been populated.