We had some players abusing the given additional time when pick/place cards, making the game so long that people would leave the table.
A first approach was to give additional time only when piles were completed, and players has to be really fast to get their first pile completed unless they ran out of time.
It was a mistake and I apologize for this.
A new timer algorithm has been implemented to comply with both problems : players will gain additional time during the first 3 minutes of the game or when placing cards on the board only if they complete piles during the 3 lasts minutes.
I hope you'll appreciate playing Piles without timer warnings now!