Interesting notice from CIS after I-485 approval...

I received my new green card a few days ago, but I received a notice yesterday from CIS about my phone inquiry of my case on 02/22. The letter is dated 03/11 and says that my case is under review and I will receive a notice of action within 60 days... Two days later on 03/13, my case was approved. I thought it was kind of funny that the notice came too late and of no use. It also indicates the lengthy turn around time at CIS after a customer's request. I had made numerous phone calls, and this is the only response I ever received from CIS.
So, your case may be approved very soon.