How is Eduardo unaware of the progress on Face Mash?

Question

In the movie 'The Social Network', in the scene after Fashmash has been created but the algorithm has not yet been coded, where Eduardo Saverin gets back to the dorm and talks to Mark about how he and Erica broke up, Mark asks him how he already knows and Eduardo responds "it's on your blog".

How is it then that even though Eduardo has been on Mark's blog that he is unaware of the fact that Mark has hacked the facebooks for the other houses on campus, or that he's in the process of creating a website to compare women even though Mark has been blogging about his progress?

Answer 1

Perhaps it's because the breakup was one of the first things Mark blogged about, and it was only later in the night that he blogged about how he was creating Face Mash.

So if Eduardo had only seen his first posts before heading to his dorm he may have been unaware of Mark's hacking later.