The problem you're describing should be the fault of the delay set by the scan group, in which the system announces that the chapter is available on the servers but is unavailable due to the delay hence you can't see it yet. It is a known "bug" of sorts, but since Batoto is one of the few sites (if not the only site, afaik) that follows scanlator delay policies, there isn't much we can do for now.
Additional Info linked by my fellow mods:
http://vatoto.com/forums/topic/15576-how-the-my-follow-view-by-comic-is-sorted/#entry1031245
http://vatoto.com/forums/topic/16410-follows-bug-old-chapters-surfacing-with-addition-of-new/page-2
Ah, thanks for the fast reply. I understand it now.