Are these numbers right?

Hey everyone!

I'm new to MFP so manybe there is something I'm missing but some of the food and exercises on here seem to have WAY different numbers then any other site. I've used many calorie calculators so I have a general idea of the calories in what i I eat but when I logged my food yesterday some of the number were coming up as less then half of what it should be. I checked all the settings and everything was inputted properly. I checked 8 other calculators and they were all the same as each other but not the same as this site??? I found the same with some of the exercises. They come up as almost double the calories burned as any other site/what seems realistic. Does anyone have this problem or is there something I'm not getting lol??