why does facebook say that i'm on?

[UltraPedo Senses Tingling]

not on chat, but just on in general. for the past two months my picture has been put on in the side chat and it says i am busy, but that i am on facebook.
the reason i worry so much is because my boss checks to see if we are working and checks facebook frequently. i have gotten in trouble 4 times for being on facebook when i wasn't even on! i log out and it still says i'm on.

[Lenny]

How do I turn chat on or off?

To turn chat on or off:

-Click Chat in the lower right corner of your screen
-Click the gear menu in the chat sidebar
-Select Turn On Chat or Turn Off Chat
I
f you've previously turned on chat for only some of your friends, chat will only be on for those friends. For example: If you have chat on for only 3 friends, turn off chat, then turn it back on, chat will still only be on for those 3 friends.

To turn on chat for more or all of your friends, you'll need to adjust what friends you're on chat for.

Note: While chat is off, chat messages from friends automatically go to your inbox for you to read later. You’ll also receive them as messages on any mobile Facebook apps you choose to install on your phone.