You mean you can remember one dream every night?
Well it is not so bad, remembering one dream a night is OK.
Anyway we all have periods in which our recall ability ( and lucidity ) is better or worse, just keep trying until it improves.
Also maybe your initial enthusiasm has been reduced. You have to face it that training for better recall and for LD is a long process, and you have to try to sustain your motivation. Try different things, and change things to keep the effort fresh, for example try using auto- suggestion techniques before you go to sleep, try to use an alarm clock at night to wake you up and if it wakes you up during a dream write it down, try maybe CD's of self-hypnosis and subliminal messages or brain wave entrainment programs.
So try to keep the effort fresh and interesting by trying different approaches along with the basic approach of keeping a dream journal.
And most importantly as I said be patient, your progress is gradual and sometimes it will look like you are regressing, but if you keep practicing consistently you will eventually improve.