Do I understand it right, that lottery will be only for applications made on 5th day, not for applications made through whole week? My application was on 1st and I don't know if I still can get screwed by randomness.
No, USCIS collects all the applications received during the 1st five business days and put them together before they are lottried out. So any application received after today would automatically be rejected.
"USCIS will use a computer-generated random selection process (commonly known as the “lottery”) for all FY 2014 cap-subject petitions received through April 5, 2013."
It says through april 5th. So, All applications will face lottery even if you submitted yours on april 1st.
