I thought this happened last weekend when I played a couple games - but since I don't really pay attention to points I thought it was just my mind getting old.
Today - one week later - I feel better about my mind. Because again, my opponent decides he's lost.....instead of surrendering.... lets the time run down. When time gets to zero - the screen sits for a long time - nothing happens - about 30 seconds later...... I get a victory screen saying my opponents time has run out.... and I lose 11 points.
Prior to this game nothing unusual has happened - no disconnections - played a couple of games - didn't get any huge number of points by mistake, etc.
I believe exactly the same thing happened last weekend - played a game - opponent lets time run all the way down - large delay before victory screen - and I lose points.
I have a screen shot from today if you have an email address to send it to - sorry it takes too long for me to figure out how to post stuff online.