Has my account been hacked/compromised?

[XBumbleBeaX]

My friend got a teleport offer from me, even sent me a snapshot of the chat showing the offer to a sim we had been to two days ago, yet in my chat window there was nothing saying I had sent her a teleport offer, I was even in a totally different sim at the time. And I'm a hundred percent certain I didn't accidentally click the offer teleport button. Is this some sort of firestorm viewer bug? Has my account been hacked? I'm kind of freaking out about this. Any piece of information helps, thank you very much in advance. 

[Alwin Alcott]

if you were online, nobody else can be on your account. And hacking is nealy impossible. I won't say it happened never, but 99.9999% of the users who state they are hacked are in fact pished and gave their login info themself to malicious sources.

it  most likely is a previous send tp or IM getting delivered later... for some reason some come not the same session, and go to the IM box at next login or email.

imho nothing to worry about if it's just one time

[Madelaine McMasters]

I'm with Alwin on this. Given a choice between blaming odd SL behavior on hacking or Linden Lab, I'll pick the Lab Rats every time.