How to gain weight steadily ?

hi i used to be obese weighing 213 lbs on 6 feet tall so i restrict diet for for months and lost 100 lbs and now i am underweight weighing 113 lbs and i was told that i am anorexic but now i really want to gain weight about 30 pound to get to 65 kilograms because that is my ideal weight when i was dieting i was taking about 200 calories a day and all of you would say that i am in starvation mode and that my metabolism is slowed down but i have ended the diet three months ago and went up gradually in this three months to 1650 calories per day and have not gained a pound i actually lost a little weight but now as i want to gain a little weight i upped my calorie to almost 2100-2200 calories a day to gain half kilogram a week so would that amount make me gain weight ? and how to know that my metabolism is back to normal ? and another question is that do i consider to be anorexic or not ? and how much do anorexics eat to gain a pound a week during recovery ? and thanks