As long as you are hitting a comfortable, repeatable anchor, your form hasn't gone completely in the dumper and your accuracy is semi-consistent, you've got nothing much to worry about. It's kinda normal for your draw length to shrink after you've just made the switch from compound - where you've been used to really stretching into the draw - and have been shooting traditional for awhile. If, in a few more weeks, your draw length is down to 24", then you would get be right to be troubled.