Your food looks balanced and healthy. I would ask you if you track your food using any tools? (MyFitnessPal, etc.)?
My first guess is that this might be more than 1000-1200 calories? I could be wrong of course. Do you do track everything down to the grams? I am not a fan of obsessive tracking nor do I practice it to be very honest, but when you are struggling to lose weight and you're doing everything right, then these tools come in handy and really give you an idea of what your intake is vs your output. I would say - if you already don't - do invest in a food scale and all the measuring cups, spoons and apps.
Another thing to note which has been said time and again, is that not everybody reaches their goal weight, as long as you're happy, fit and healthy, it is kind of the whole point, plus muscle mass that will affect the scale and the whole shebang.
As for stabilization, I stabilized at 9.5 months which is considered very early out, reached goal at 3 months and continued losing until 9.5 months and my weight has been stable for the past two months. That doesn't worry me nor does it affect the fact that this journey has been a success to me, success is very subjective and it comes down to being able to (mostly) maintain whatever weight you have lost + building good habits. If this means that you have lost 78 pounds + started serious exercise + dropped multiple sizes then it's a win in my opinion. Use every tool out there for your benefit, but also remember that you define what success is to you.