Hi, just receive the watch from the seller. I expect it is kind of a chronostop watch but found out is a watch with start/stop button. The watch only work when i press the top left button and it will stop when i press the bottom left button. Otherwise the watch will not run. Correct me if i am wrong, chronograph is a watch with time and stop watch feature. The watch should work independently with the chronograph feature. Or did i miss something? Suggestion?