Why am I overweight? I can't work it out

[Gibralter]

It just doesn't make sense to me. I track every last thing in my fitness pal and I've been eating this way for about 5 months. I'm only overweight by a pound or two but surely I should be a lot slimmer?

Typical days food is:

Two slices of seeded brown bread with low fat spread and marmite OR porridge with blueberries on top OR a glass of fresh orange juice, two eggs and a small slice of toast.

Lunch: Rivita crackers topped with a 20 Calories laughing cow spread, cucumber OR avocado toppings, with banana and Diet Coke, OR sometimes I have for lunch a very small portion of last night's dinner.

Dinner: Vegetable curry (home cooked, low fat), OR vegetable rice and chicken, OR low fat Bolognese OR pesto pasta.

Snacks: Passion fruit (one), banana, raspberries (a handful or so), and sometimes on a Friday, a chocolate brought home by DH. It's rare I have more than 2 of these snacks a day.

Where am I going wrong?

I don't secretly eat other things, I'm also breastfeeding. I walk mostly everywhere. I go up and down a big hill with shopping etc.

I'm not very active indoors but is anyone, apart from my cleaning?

As LemonysSnicket said.

I'm 5'4 and need 1500 to maintain. I'm a woman, fairly sedentary. I don't need 2000 cals per day, its just ridiculous.

Don’t reduce your calories, it will lower your metabolism and then you are truly screwed. Change the type of food you eat. Try to cut out any processed carbs. This includes flour based and sugary foods like orange juice, pasta or bread, white rice. Go full fat, natural proteins, oven cooked chicken, fish, roasted beef/ pork, accompanied by veggies, preferably green, ideally steamed (or blanched, boiled). Unlimited eggs, good fats like olive oil. Easy on the fruit, avoid if you can as it is full of sugar. Dried unsweetened fruit and nuts ok. Make sure you drink lots of water, at least four pints, especially if breastfeeding.

The above is advice from my personal trainer. I hit a plateau in my weight loss after 2 stone, and lost nothing for 4 months. With the above changes to diet, started losing again, 7 pound gone is the last 5 weeks. This diet will make you feel light and full of energy, too.

"But in real life, everyone I know (with one exception) expects their meals to be pretty carb-based. Typically cereal/toast for breakfast, sandwiches for lunch, dinner generally involving rice, pasta or potatoes."

Yes. I had lunch on a course on Saturday. It was sandwiches, a bit of fruit and some small cakes. If I was carb free, I would have been able to have just the fuit or not been able to take part in the free buffet.

Usual breakfasts are porridge, cereal, toast. I know some people just have yoghurt, but I don't find that filling.
Easiest packed lunch is sandwiches.

How much are you sleeping? I can lose a pound between 4am and 9.30am if I get the chance to sleep that long.