In my account settings I have set a target retention rate of 95%. But my real retention rate tends to be around 90-91% or so. Why is this? I thought that the words would be repeated until the target retention rate was reached, but after a while during practice I every day get words which are less than 100% due.
The program still adds new characters every now and then. Is there something I can do to increase my real retention rate? Or am I just a slow learner?