Question Alfa are in this group??

When I visit a group this is posted to the wall. Does this mean 'Alfa has visited this group'?

Anyone?
I dont get this function.

The messages was posted when you join an group.

Sometimes it s posted without any name:
' are in this group'

Yes. When he/she left the group the message being empty. :/

Does the group post a message every time someone "visits" the group or just if someone joins and completely leaves the group... then of course it should read

XYZ joined the group
XYZ left the group

...and not "are in the group" for both...

No. Just design for someone join group only.