That setting is designed to track fast moving subjects... not necessarily slow moving or static subjects.
Check THIS out: http://www.sony.net/Products/di/common/ ... _Guide.pdf
Then I STRONGLY suggest you consider purchasing the A77II EBook by Gary Friedman.
Friedman is a NASA scientist who is also an award winning photographer and one of the BEST 3rd party owners manual authors in the business.
His books are EXTREMELY well written, covering ever single feature and capability of your camera in great detail, but in plain, easy to understand language suitable for everyone from the beginning photographer to the season professional.
Gary offers a 2 week satisfaction or your money back offer, but in my experience... and I have purchased a number of his products... you would be willing to pay TWICE the price for what he gives you and STILL feel like you came out ahead on the deal.
Check this out:http://friedmanarchives.com/alpha77II/index.htm
Good luck, and enjoy your camera!