Shared Team member capacity hours don't add up across Portfolio plans?

[Jeremy Price]

EX. I have a team member (Zack) that is on a shared team (Team 1) but is on two different plans (Plan 1 and Plan 2). 

For Plan 1 I have Zack scheduled to work 15 hours on a Story ticket so it shows his capacity as such for Sprint 1 with dates 12/10-12/24.. 

Then I got to Plan 2 and add Zack to a Story ticket with 15 hours for Sprint 1 with dates 12/10-12/24. (Same time frame/Work week).

On either plan 1 or plan 2 it doesn't reflect each plans total hours that were added for Zack. On both plans I excepted to see Zack showing a total of 30 hours scheduled for Sprint 1 time frame.

However it doesn't seem like the team members hours goes across plans to show a total sum of the individuals scheduled hours/work availability. 

Does portfolio add up the sums of hours per team member across all plans or is the hours available on the capacity view only based of per plan?