It's because in UNA there are 3 (t-h-r-e-e) different feeds - global Outline, subscriptions and user's. 

When user's feed is very handy, two others are totally disappointing.

You can see album changes in subscription feed (through Dashboard), but can not in Outline. Which is, imho, very non convenient.

BTW, it's not only with album - Groups and Events activity divided in such manner too : Outline bring you only opening occasion, but not the updating one. 

I'm trying to ensure UNA guys that it makes no sense, but  when I'm alone - it have not affect, obviously. let's say it together: bring us, please, ONE FEED with global news and with subscriptions, like in FB, OK and others.