Filing Married SHOCK

Hello I just ran my taxes two ways - as single and then as married filing separately.

It was shocking - does this make sense?

 

1. Filing single my estimated refund was $5700 fed + $1400 state

2. Filing married separately: Refund $105 fed + $405 state.


Both itemized settings. Not standard deduction.

 

Does this make sense to anyone - maybe I selected a wrong option under married? This is NUTs  :I