1) That port is holding a stock the opposite of you. That stock moved 10pts... it gained 1 mill while you lost 1 mill (or any combination of stocks to equal 1 mill... but since they haven't traded since last August, it is likely that one stock is to blame).
2) SANDR adjust at max shares would put you up +2mill for the day. Somehwere else you have lost 1mill and we call that a 'bleeder'. One stock (most likely) has lost you 1 mill (or any combination of stocks) and you cannot see it clearly because the stock that lost you money is still showing a profit.
example... you invested in Stock XYZ at IPO for $50 and it went up to $75 showing you a profit of 2.5mill in your port but it went down 1 mill today and when you are looking at your port you do not notice it right away because it is still showing a 1.5mill profit (down 1 mill) in your port.
Check today's biggest movers here and see if there are any moviestocks that you are holding the wrong way.