Bonjour Messages Problem

I’m having problems getting Messages to work the way I expect it to. My wife and I use Messages via Bonjour to send things to one another. The problem is that the process usually goes something like this:
1. One of us sends an image, link or whatever via Messages.app
2. A notification of the message appears, and clicking it launches Messages. However,
3. The main Messages window is blank, and the conversation pane lists only “Untitled.”
4. Double clicking the name in the Buddy List fills in the name in the conversation pane, but still nothing in the main window.
5. The other party sends the message again, and the window fills in, including the previous messages.
Is there some kind of preference that I’m missing? Is this how this is supposed to work? In previous versions, clicking on the notification would bring up the previous conversation. In fact, it would be visible just by opening Messages.

Hi,
Saved Chats is the tick box for Save on Closure.
The pic looks like a Font may be missing.
It seems AppleGothic (all one word) is that has been Needed since Mavericks.
Use the Font Book App to check it is Active, not duplicated and Validates (File Menu)
Previously the Helvetica font was the one that displayed the titles of the windows  (Your Bonjour window has no title)
I believe this is now Helvetica Neue
It also used to use Lucida Grande to title the Group Bars when you used Groups in Buddy lists.
The "New Message" item does not look right.
Mine looks like this
And of course "no recipients" cannot also be "offline".
Text that is Helvetica. I have also changed the text size to distinguish it for the regular font.
Text that shows Lucida Grande (this is not a choice on this page and you will only see it if you have Lucida Grande on your computer to display it).
8:01 PM      Saturday; December 6, 2014
​  iMac 2.5Ghz i5 2011 (Mavericks 10.9)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad

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    If it is then you Own the file.
    Does the list read that you have Read and Write permissions ?
    Example pic with cogwheeel drop down open
    Concentrate on the one in the pic and the ones with AIM, Jabber and Yahoo in the file name.
    Also do the same for com.apple.imagent.plist, com.apple.imservice.iMessages.plist and com.apple.imessages.bag.plist
    Post back with what you find.
    9:09 PM      Tuesday; March 19, 2013
      iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.3)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
     Couple of iPhones and an iPad
    "Limit the Logs to the Bits above Binary Images."  No, Seriously

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