Merged Tickets - for reporting purposes

I am running RT v3.4.2 and noticed that tickets that are merged together
Will not have a “resolved” date set - even after the ticket it is merged
into is resolved.
In other words, I have two tickets, 101 and 108. I merge 108 into 101,
because they were a duplicate.
I see that ticket 108 has been switched to a status of resolved, although
the date still says 1/1/1970 in the database.
I then close out ticket 108, and that resolved date is set right.
Has anybody made any modifications to make the status of the ticket that
has been merged from “resolved” to “merged” ??
How has that affected performance of the overall system?
T.J. Maciak
Internet/Intranet Developer
Department of IT
City of Grand Rapids
P: (616)456-3713
F: (616)456-3448