I have seen some variations in this degree plate and they don't always display up to 16 degrees as Roger's illustration shows. It's difficult to get a full sized pistol grip style timing light in a position that it doesn't obscure your view of the timing marks. A small round timing light can more easily be guided down near the timing marks, giving you a clearer line of sight from above.
I also noted that the instructions don't tell you that you should also turn off the engine before removing the jumper from the ALDL. With the amount of detail Roger provided, that was something easily missed. Don't worry about the timing marks lining up after you've removed the jumper and restarted the engine. This is the ECM taking control of the timing for optimum performance.