@mazingerz88 I can tell you my nutrition professor would agree with me.
How tall are you?
1500 is for the most part a certain weight. That is not a lot of calories unless your fairly short. 1500 with low moderate exercise is probably around 135 lbs? No exercise maybe 145? You would need to do the BMR calculation. Although, more importantly you just need to figure it out for yourself, meaning your individual number that works for you. Make sure you’re adding the calories correctly.
Try to eat more veggies. Especially, leafy greens. Also, try cutting out dairy for a few days and see what happens.
If you are eating fewer calories than what it should take to maintain your current weight, then mostly you are storing protein (amino acids) and carbs (glycogen) efficiently and none if it is going to fat. If you are overeating heavily at one meal then the excess would go to fat, which is harder to get rid of. Or, if you are eating high fat meals too.