Congratulations on losing so much weight, but as I'm sure you are realizing, it's not just a diet, it's a new lifestyle. Sometimes it's hard finding a maintenance plan that will sustain the weight loss. I think part of the problem is your body has adapted to your exercise routine, and it is no longer burning as many calories with the routine. I think it would help to try many types of cardio . Muscle confusion can burn more fat, and building more lean muscle with weight training will enable you to burn more calories throughout your day.
I would encourage you to figure out how many calories you need to eat through out the day in order to lose weight in a safe time period and how many calories a day you need to eat in order to maintain your goal weight. There are many websites that can help you figure this out. It sounds like a pain and too much to worry about by counting your calories, but with time you will be able to figure out how many calories you have eaten in your head, and be able to cut back when needed. Also, when you count your calories you will naturally steer yourself towards healthy choices because you can eat more. For instance, a slice of bread is usually between 100-200 calories. If you are eating bread with every meal, you could be adding up to 300-600 extra calories to your calorie intake a day. You would have to eat 8-9 apples to equal the same calories.

Heavily processed food like white bread has a lot of empty calories leaving your body to feel like it needs more not long after eating it. I also encourage you to eat many small healthy meals around 200 calories instead of eating just a couple big meals. Eating a lot of little things helps keep you from feeling deprived and less hungry. Plan ahead and keep healthy snacks available at all times, it's when you are staving that you can make bad choices.
Hang in there
PS- I personally never add my exercise calories burned to my daily calories intake. Otherwise, I never allow myself to eat more because I exercised for X amount of time. It's too hard to accurately measure calories burned, and the cardio machines are never accurate.