Authors should really indicate if they spread out the posting of parts. If they have a posting schedule I like to know when to check as to not miss anything, and I also like to be prepared that I won't get to read the whole thing right now.
I don't mind even following unfinished WIPs but if I see a post linking to 1/3 in community and the notes talk about the story as if it is finished, I assume that all three parts are posted in the linked journal. But recently, especially it seems in Star Trek Reboot, headers neglect to mention staggered posting/WIP status. I guess I'll have to remember to check myself in advance. *grumble*
That said, the
Reboot time travel murder mystery of which I just read the first part is a really promising opening, which probably explains why I'd have like to get the rest right now.