Departing tomorrow SYD-LAX - checked www.flightstats.com and it shows UA840 as departing 10 mins later (schedule change). Found this change over 5 hrs ago (6pm EST SYD time). .Bomb still shows flt departing at scheduled time as per my itin, not 10 mins later.

Which one is correct? Flightstats or UA???

Help - I am going to bed soon and I guess overnight all sort of things could happen to my seat assignment while I sleep, by the time I get up to get to airport tomorrow (9/26) - well who knows what will be happening

Is it possible to lose assigned seats for a 10 min schedule change?

Thanks in advance