Nemesis: Although you are watching your calorie intake you are expending too many calories while not having enough intake. A net loss in calories will = weight loss. With your consistent mixture of the amount of cardio and resistance training you are burning a lot of calories which is how/why you lost so much weight (some of that is water weight also). If you are looking to weight loss then obviously cardio will do that faster than just lifting weights but of course a balanced diet is really the most important aspect. Resistance training is just there to stimulate your muscles so that they don't get too weak while you are on your weight losing phase; so make sure you eat enough protein (100g/day is a good number) to minimize muscle loss because when losing weight you will always lose muscle mass too. It's really hard to just lose fat only.

In conclusion, I think you should alternate your days of cardio & resistance training and throw a couple days of rest in between to help your body recover because rest is very important. So if you are planning on still doing the same amount of exercise then eat more so that your body can sustain all that physical activity without having to feed on muscle.