My friend, I'm a computer guy and when I see the case status online, I don't think the site is in its greatest final version, It needs lots of improvements and I think they will improve it at some point.
as you know your docs could be in the different locations that this process involved in (like doc mailed in one place and mailed and processed in different places and then your FP done in another different place)
someone has to scan your receipt as you know by now and update the information that goes to your account online.
there are lots of synchronization between all these different offices and the computer system, considering all the fact of the security that involved in this.
workers have to be trained and adapt to this new system and implement it properly.
sorry to confuse you more but with high security process and different applications and different offices that process them, and one computer system that controls that, it won't be perfect, unless a lot of investment have to be done to move to the electronic version of the applications and the process.
I suggest that you take the online update as an indication to where you at and depend on your mail box for mails directly from them.