weigh in...lost weight and wondering if I should boost my intake

okay so, this week was graduation week and i weighed in today and i came in at 1 pound less than last week, i've been moving a lot and i underate for 3 days while my family was visiting. they just don't eat on the same schedule as me and eating is really not a priority for them...basically, i came in at about 1400 calories less than my typical intake...yielding an average of 1700 calories daily. I usually have about 1900 or so, well that's my goal at least.

here were my workouts:

Saturday: nothing at all since this was graduation day at 7am

Sunday: 45 minutes elliptical at the hotel gym

Monday: 50 minutes strength, 15 minutes elliptical

tuesday: 40 minutes spin

Wednesday: elliptical for 45 minutes

Thursday: arc trainer for 45 minutes

Friday [today]: 2 mile jog and 20 minutes HIIT [sprints and walking], with 10 minutes strength

Plus, i was moving so I did a lot of packing/unpacking. I wouldn't think that I would have lost an entire pound though since I am only 4'11 and usually maintain on about 1900 a day..with more intense working out. I didn't workout very intensely at all, and my intake was only 200 less, so i would have thought it would have balanced out but i guess not. based on the 1 pound loss, i would estimate that I need an additional 400-500 calories to maintain and not merely the 200 less than I ate this week. so, that would bring me to 2100-2200 to maintain, does this seem right? I didn't mean to undereat so please don't harp on that point, honestly i forced them to get up and eat breakfast because usually they don't even do that, so it could have been worse. I am trying to be in tune with my body and give it the fuel that it needs, so that's why I ask. my exercise regimen won't change much this summer since it coincides with my work schedule. so, that would be consistent. would this be considered moderate intensity? 

I think it sounds about right. You are doing quite a bit of exercise, so you would naturally need more calories to maintain than you may have figured for.