That sucks, I actually posted about this on the last page, sounds like you're ok but always wait until you have a signed contract before you quit or spend any money on plans. I have a colleague that went through the same, except he actually quit his job. Shit situation.
Question, when do you update your LinkedIn profile, when you start working or after the probation period?
Also, how to tell your interviewer that s/he's wrong? I've had this happen a couple of times. One was especially annoying because I knew for a fact I was right (it was a tangentially related subject). But the guy was the IT Director for a company with 20k employees.
And, how do you deal with inappropriate work experience? I just say "anonymous client", but there really isn't an NDA. I just don't want to advertise that I worked on a Porn/sex toy web app.