What's happened here is that there's a metal frame attached to the screen that provides the attachment points to the body of the phone. Somehow you've managed to separate the screen from its frame rather than separating the screen+frame assembly from the phone's midframe. I've seen this happen on some of the newer model phones as well as aftermarket screens that don't use a strong adhesive to hold the screen frame in place.
Using this picture as a guide, you'll need to go around the edge of the phone again, only this time get between the screen frame and the midframe, separating it on all four sides.
[image|3661445]
Once it's separated you can go back to the guide and pick it up at Step 18.
Unfortunately, the time this happened to me I didn't have any luck; when the frame came away from the display it ended up damaging the OLED and I had to replace it. If you're lucky and your screen is still functional you'll need something like B7000 glue to resecure the frame back on the screen before you can put it all back together. Make sure if it's bent that you flatten it completely so it sits perfectly on the screen before you glue it back down.