Bulk transitioning the resolution to close affects the "Issues: 30 Day Summary"

Summary

• The "Issues: 30 Day Summary" graph from the project administration page increases when transitioning issues from Resolved to Closed although they are supposed to be in the same category.
• This issue is related to the closed suggestion - https://jira.atlassian.com/browse/JRA-29899

Environment

• JIRA 6.4.12

Steps to Reproduce

1. I selected issues using the filter:

   project = 'XXX' and status = 'Resolved' and resolution is not empty
   

2. bulk transitioned these with the "Close" transition while setting

   resolution = 'Closed by Multiclose'
   

   ('Closed by Multiclose' is a resolution that is never set for the issues in "Resolved" state. The customer uses this resolution only to indicate that he closed issues using a bulk transition)

Expected Results

• The "Issues: 30 Day Summary" graph from the project administration page should not increase

Actual Results

• The summary increased by the same number of issues that i bulk transitioned.

Notes

• If i do the same transition using a single issue matching the filter above this also counts +1 to the resolved issues.
• Only if i do not change the resolution on transition close the issue is not counted again as resolved.

The behavior is:

• When resolution is changed the resolved issue counter is increased.
• When resolution is not changed the resolved issue counter is not increased