Yes you got AIP. That line just means a decision has been made on the first portion on the application (AIP). When you are finished with the second portion of the application it will say that they send a letter to your address. Your status on e-Cas will then change from "in process" to "decision made" meaning they made a FINAL decision on your application. The reason it still says in process is because it technically still is being processed since only one stage decision has been made. Whenever you land, it will change to "complete". The reason you didn't get second stage approval at the same time is because they are waiting on your police certificate. If all medical, security, and background checks (which is what second stage is) is approved and finalized then you will get the second portion approved then move on to waiting for an interview from your local office. Now, you will need to send the certificate asap. The approximate waiting time on the site is 9 months for the second portion but hopefully it will be sooner than that but I would say about 3-6 months. Good luck and congratulations.
P.S. So does that mean you got AIP two day ago? Usually e-Cas updates to say things two days after a decision has been made or something is updated.