It might have been a cancelled order or something that popped it back in stock. It's not in stock. I don't think the LX100 has anything to do with it.
I think despite having a yellow button it was out of stock minutes after you got yours and PM'd me a thank you (I checked out of curiosity). Their website has a nice "feature" of leaving the yellow add to cart button active but when you click it you get an error message telling you it is out of stock. You know, just to get your hopes up and then squash them. Voice of experience here!
Well, as of this moment (September 17, 15:32 EDT) it's back in stock again.
Olympus' inventory control system is . . . interesting.
I did manage to order one earlier today, thanks to a heads up from mu-43 member 'kwalsh' -- thanks again!
And though the LX100 seems a fine camera, I too see no connection between it the 12-40 lens.