Of course you do. You have to have your ATP before going to upgrade training. That's what I'm saying. During your CA IOE, you have ALL of the appropriate certificates (ATP) and type rating to log PIC. However, the Check airmen is the PIC until you get signed off and are the pilot who signs the release prior to each flight. This provision allows a pilot to log PIC time during IOE since you're performing the duties of PIC under supervision. Even though the check airmen is the PIC.