I also saw some of the DLs - esp Waking up in Las Vegas that had separated at the Nordy's near work.
Yes - waking up in vegas seems to be notorious for separating. All the bottles at my local department store had separated.
I ended up getting mine online and when it came it was all one and well-mixed. I put it in my medicine cabinet which I only use to store some of my nail polish (so no light whatsover) and the next time I opened the drawer about two weeks later, the polish had separated.