If you've been separated over six months in 2014 you can file single if you'd prefer, but of course you'd have to negotiate who gets to take the mortgage interest deduction and you'd probably lose since he kept the house. If you file married/joint and your income is higher than his, you've got some math to do sorting out the ratio between your higher income and his mortgage interest deduction.
I used to be a CPA and am not anymore, but I did recently research this with a reputable source.
WRT the household division chart, it would be worthwhile to ask an attorney if the court really cares about the details or if you can put language on the form that states you've already separated the households satisfactorily, and then maybe you'd both initial acknowledging that to be the case. I know in other industries those forms are made up for the worst-case scenario and aren't ALWAYS required to be completed strictly.
Me42, H40 D12, S8, S7 A revealed: 7/13 Sep 4/14; Agreed to D 1/15