profit/loss

[marktre]

my account summary during trading hours differs from my positions.  When I open my positions, 3 of 4 positions seem to read correctly,  However, the 4th position is giving me profit/loss based on a share price that is older/lower.  The sum profit/loss at the bottom agrees with current share price.  But the individual share does not. As an example, I bought 100 shares of stock at $5.  The current stock price is $6.  My profit/loss summary shows profit of $100.  However, when I go into my positions and look at profit/loss for each stock, I note that the profit/loss for this stock is measured against old share price (several hours to a day old).  That price is lower (say $5.10) so for that stock it is reporting profit of $10 even though the summary says $100.  

Question:  What amount would I expect if I close the position?