Hi yes it's annoying there is no breakdown from the state return additions and subtractions to help tie out and identify issues, I've found the only way to do it is to track the expected figures offline and if they don't hit then go over all the 1099s with fine toothcomb until finding the issue.
It sounds like you've set up the 1099s correctly to isolate muni interest and it's adjustments for NYS and out of state.
The problem you're describing sounds like an issue that I've seen a few folks report whereby the out of state munis don't have any effect on state i.e. behave as tho in-state. It's something to do with the state allocation setup (NY vs. Multiple States etc) so and I would double-check this on the 1099-INT. It may look ok but based on a few posts there seems to be some sequence of steps of changes which cause this to get messed up behind the scenes.
If you are on desktop, bring up the 1099-INT in forms mode and under Box 8 it will show the state allocation grid, at the bottom there is an additional line "State ID where exempt interest was earned. If more than 1 state, see Help". That should be set to XX instead of NY. If you change anything in Forms mode make sure to go back thru EasyStep and ensure it's not in yellow "Review" status.
One thing you can also try is to re-input the out of state 1099-INT again and see if that clears the issue.
