Total income different if MFJ vs MFS

I was checking whether it is better to file federal as married joint or separate. I noticed the following when I checked the different combinations:

Total income: federal joint > federal separate for me + federal separate for my wife

Total AGI: federal joint > federal separate for me + federal separate for my wife

 

How come the separate federal incomes and AGIs do not add up to be the same as the joint amounts? Or am I missing something? I filled in separate returns with our corresponding tax forms, and then the joint return with all the same tax forms together, but the amounts don't match for some reason.

 

Thanks!