I’m using facebook open graph to make a custom action like this:
UserName is tagging a Post with MyApp.
It works well, but I have only one problem:
In my recent activities I have:
Bed77 is tagging a Red Gorgeous Post with MyApp.
and in my wall I have:
Bed77 is tagging a Post with MyApp.
“Red Gorgeous Post” is the og:title that I have set for that object in my page.
Why it’s fetched only in recent activities and not in the wall?
It’s an automatic facebook decision?
Explained with one image:

Thanks.
Yes, the locations of object-type and object-title are determined by Facebook in what are called ‘Timeline Units’.
In your example, “red gorgeous POST” (the title) is displayed below the header (“Duccio is tagging a POST with PostBlogger”).
Recent Activity has a different format that is more compact.
In OG Aggregation Units you have some control over the display of objects and their attributes. For example, if you have a
Trip, you could display the km/miles of that trip withTrip.distancein the Aggregation unit.