For any of you that have the Whirlpool Duet front-loading washing/drying machines, have any of you noticed that the estimated time left seems to take much longer? A few times it will say, for example, 20 minutes left and then 10 minutes later I will go downstairs and it will say 18 left. I know it says "estimated time" but shouldn't it be more accurate? I've read the manual and I couldn't find anything about this particularly.

Have any of you noticed this as well? It's the same for both the washer and the dryer I've noticed. Thank you.