Facebook online/offline question (Please read)?

[The secrets that I keep]

Well today I've been having a few issues.
I was chatting to my boyfriend on facebook and he said that he was going offline to go to bed.
I thought nothing of this, but 10 minutes later he was still 'active' on facebook.
He doesn't have a mobile device that connects to facebook and he ALWAYS logs his laptop off properly.
I was wondering; is he avoiding me or does facebook tend to lag when it shows who is online/offline?
Does it falsely show people as online when they really aren't?
Thanks for any answers in advance

[Carl]

Honestly, I think it should change to offline/online status straight away, but obvoisly that depends on your internet speed, etc. have you refreshed the website ?

[screennamegorilla]

Yeah sometimes Facebook screws up just because he stays online for a while after saying goodnight doesn't mean he's cheating or anything

[Daniel]

Its Possible he Could've Left His Facebook On Either That Or its a Error With the Online/offline