When I've logged in recently,it tells me the last time I had logged in,or was last active. The times stated are clearly indicative that someone else is logging in with my SN.
How is this possible and what can I do about it?

Change your password. Make it a little harder to guess this time.

9

Yeah, USETHEFORCE was too easy.

I agree with doodlehead - just change your password if you're concerned.
That said, that you disagree with the last login time I don't think is evidence enough that someone is using your account.

Another vote for changing the password.

Also, I don't know if this applies but I've noticed that the times are based on EST which may or may not explain the discrepancy.

I know that mine doesn't always update what time i last signed on properly.

Apparently so was IAMYOURFATHER.Why not?

like Arizona and C&H alluded to above, the software may calculate your last login time differently than you think it should. And things get messed up, like when there's notification that you have -2 unread messages.

Change your password, but odds are its just a bug because I know others have said this has happened to them too.

<pointed look at Int>

lolol...no, unfortunately (or fortunately?) h.com is as bulletproof as a

You never were good at telling lies.