DHC134

I am now having the exact same issue, I have 4 open positions and my largest one (which is a US position) has just disappeared. my P/L shows the total as if it is still there as a line item, but it isn't there... When I go into the stock in the trade screen to sell, the "SELL" option is blocked out as it thinks I don't think I own any. I called up the IT Helpdesk and they advised it is a glitch, and are expecting the US positions which have disappeared to come back on line after the weekend.