That should not have happened, if the 1.2 day timebank balance is correct. Go through the game log and look at the times used for each of your moves. Then if you confirm the 1.2 day balance, send feedback (link at bottom of every page on the site).
White time remaining 101208 seconds (1 day 4 hours and 6 minutes)
TO available at 2016-05-08 03:28:19 (1 day timeout + 1 day 4 hours and 6 minutes approx)
Timed out at 2016-05-08 06:49:00
The confusion comes from the fact that we show the time bank remaining at the time of the timeout, even after the game timed out. (When it should be shown as zeroed.)