I just found out that if I click on my profile then on Albums link, it will show all albums posted, each album with slider will show all uploaded pictures in album. Not only 4.

I found out that first 4 pictures in album are viewed. Looks like unfamiliar members use slider, see 4 pictures, click on them, see Feed Item (feed item slider shows only 4 too)... they dont even notice that there are more pictures in album hence first 4 pictures show views....

Since members album page uses slider with all pictures, and timeline album post shows 4 just like Item Feed popup, it looks like there should be some settings to allow all pictures to be slide, right?