Case status online delay

I am Non-AD. Last week(05/07/2018) I got my receipt notice (dated: 04/12/2018) from Attorney. I was checking my case from that day , it is showing as “Case was received”. My Attorney told me on this monday 05/14 my petition got approved (He will not share me the approval notice now itself). I was really surprised that it got approved with in a month. But when I check the case status online it is still showing as “Case was received”. Because he is employer I couldn’t cross question him. But does the case status tool of USCIS will not updated status ? when can I expect the status reflected in case status portal ?

I am checking at :

not sure about this but i am also facing something similar my status for last 34 days is “Request For Premium Processing Services Was Received”