State tax filing

The states are MD and VA, looking at the state rules the language is "May file separately" for both. I know they have full reciprocity (we should each only pay in our respective states), but I want to make sure I am not making a mistake.

 

Given that it goes from a refund to basically nothing if I do the mock separate filing, I am wondering if I should just go ahead and file jointly at the states this year (both seem to have provisions for situations like this and give the option of separate). Last year (tax year 2020) showed that we ended up owing in both if filing jointly, this year shows a refund, so I am just a little confused.