BMR AMR fat scale

So I finally got a really nice fat scale as people have been suggesting since I have lost only a few pounds yet 15 inches. IO don't look thinner and my clothing doesn't fit better but people are telling me I look less bloated and more shapely. SO I got on and it tells me my calories should 1587 for BMR and 2300 for AMR. ?????? That seems like A LOT. My MFP says 1500 for BMR. Should I really up my calories on work out days? That much?