So my sister's name is coming up on my Gmail Account? WTF?

[ProfessorDent]

Worse, I can't seem to change it back to my name.

It happened around midnight two days ago, according to online activity. I didn't do it, though I do use her MacBook sometimes, could it have happened accidentally?

Sure, I can change my password, mobile no, but for the name itself it has a little pic of a spanner, as if to say, oooh, that's not for you to amend.

It also has some of my sister's ID ie birthday coming up too. Whole thing is a mashup.

Any ideas?

Are you sure it's your account and she hasn't logged in on your computer?

Have the two accounts been linked? On my account (using Chrome) there's a turquoise 'G' button/menu which allow me to switch between my two accounts.

It's my account alright, but it has her name on it now. Accounts won't be linked, unless accidentally.

Just to clarify - the email address has stayed exactly the same, but the details are now your sisters?

Yeah, that's right. There's been a revamp of Google recently and it is doing my head in a bit, but at least when I send an email, my own name comes up on it now.

I'm lurking here, as I had my brother's details come up on my gmail account - including photo and his contacts. I thought it was because he's been using my router when he stayed here, and I seem to have altered it back by using as many "deletes" as I could find, but I still don't know why it happened.