You're at about 500 mg of caffeine a day, and 5 g creatine. My guess is that you load some creatine post workout, depending on how fast you metabolize caffeine, and then deplete it with the morning dose of caffeine and the subsequent coffee intake.
I have, as I mentioned, felt stronger and lifted heavier after cutting back the caffeine. Only green tea now. The length of the workouts have to be reduced though. A way to get the best of both would be nice. There seems to be one if you train, say, 3x a week, where you'd take creatine and your levels would increase towards your workout, then you'd have caffeine before each of the 3 workouts and get the effect of both the caffeine and creatine, but working out more often you might have to choose what gives you more in the long run. When dieting it might be the caffeine, when building strength creatine. Maybe rotate the two.