[Portfolio Live] Teams and Members don't seem to always get read from the JIRA issue assigne

This version is specifically: 1.12.5-OD-001-D20160405T074619 in JIRA Portfolio Cloud (couldn't pick it in the Affects version list)

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I made a Test Project with existing Epics, Stories, and Subtasks where they had assignees set.

I made a Live Portfolio with a team that contains these assignees, and sourced issues from the Test Project.

On display of the Scope tab only some items were given a Team, and Members. It doesn't seem to read the member from the Assignee field. There is also no ability to say "Calculate" for the member vs using what is the current Assignee for the Sub-Task, Story, or Epic.

Am I understanding this correctly?

Here's a screenshot that contrasts what JIRA sees:

And how Live Portfolio isn't reflecting it:

Is there a "force load data" I need to press?