Scroll the Gantt chart in Jan then save and open it again. while saving if you sroll gantt chart in Aug then save and reopen it will show Aug in gantt chart(default behavior)
Check setting in Project Information dialog start date, current date, Status date, Check the start date of the task if any of the task will start in August 2013.
Open View tab select timescale as days or week then save the plan.
kirtesh