Big issue when retest

I find the issue about when I build strategy only use less history like 2007.07.02~2010.10.31 then I move the strategy to rester and I set the testing date by all history 2007.07.02~2018.09.01.
But the trading result always show and test 2007.07.02~2010.10.31
So I can test strategies what I build in correct dates.

I find the issue about when I build strategy only use less history like 2007.07.02~2010.10.31 then I move the strategy to rester and I set the testing date by all history 2007.07.02~2018.09.01.
But the trading result always show and test 2007.07.02~2010.10.31
So I can't test strategies what I build in correct dates.