Thanks all, since you mentioned it I realized that there has been one variable that I've changed and that is the length of time that the beer has sat in the primary. It seems that before I had this problem if I would rack to the primary with all the trub, then I could get away with going to secondary in one week. But lately I have been racking to secondary with an auto-siphon and trying to be careful to leave as much trub behind as possible and going quickly to the secondary. This, I am learning does not give the yeast enough time to finish it's job. Anyway, I have since learned to use my hydrometer so I will go by that before racking over to the secondary or bottling (and probably using the 3-2-1 method).