Measurement not up to date value

I have created measurement to display the latest date from data entry by using following dax

LastSaleDate = FORMAT(MAX('ospos_prod ospos_sales'[sale_time]),"YYYYMMDD")

with following data, the mesurement return value 20160929 not 30.
While, createing new column and use the same command FORMAT(MAX('ospos_prod ospos_sales'[sale_time]),"YYYYMMDD") return 20160930.



I stuck with this issues for 4 hours already and have no idea what I did wrong.
Please help.