I'm new to PB myself, but wanted to make an observation.
As far as I understand PB, the macronutrients are worked out as follows:
0.7-1g protein per lb LBM - so either way that is significantly more than your 1g per kg LBM. Depending on how active you are, you could be look at 110g protein per day.
In addition you would want to be eating in the region of 50g carbohydrates per day if you're wanting to lose weight.
Then the rest of your calories are made up from fat.
I have no idea of your basal metabolic rate - if you don't know this then you can find this out online. But with the above example, you will be eating 440 calories from protein (110*4), and 200 calories from carbohydrates, which would therefore leave you x amount of calories to play with which you can use to calculate grams of fat - by working out x/9.
Does that make sense?
I would suspect that you are not eating enough protein?
Are you eating more carbohydrates that you think?
What are your activity levels?
I'm sure some of the more knowledgeable posters will be over soon, and they'll sort you out good and proper.