Is 15.00.0712.012 OK after the new CU2 for E2013 ?

We installed the "new" CU2 for Exchange 2013.  

Reference --  http://blogs.technet.com/b/exchange/archive/2013/07/29/now-available-updated-release-of-exchange-2013-rtm-cu2.aspx   ).

That article says     The new build number of Exchange 2013 RTM CU2 is 15.0.712.24

We have one Windows 2013 server with Mailbox and CAS on the same server.

Using the ecp - Exchange Admin Center   >   Servers,...we see  Mailbox, Client Access Version 15.0 ‎(Build 712.24)‎

We sent an email.

See this in the headers.

(removed some parts...)

Received: from ... with Microsoft SMTP Server (TLS) id 15.0.712.24; Thu, 1 Aug 2013 09:01:10 -0400

Received: from  ... with mapi id 15.00.0712.012; Thu, 1 Aug 2013 09:01:09 -0400

The SMTP part says   15.0.712.24   ---  OK

The MAPI part says 15.00.0712.012      -- why "012" ?

Is that indicate a problem with the install,...or it is OK to proceed to production ?

Thanks.

tags -- e2013 Cumulative Update 2 KB2859928

====