I'm sorry, I don't know much about the Marchman Act. Usually if the court has signed an Order, it has to be complied with. Did you have an attorney for the proceedings? If so, I suggest you contact him or her.
Now, assuming they DO release him, you can tell him you don't want him at home, but if he is on the lease or the deed, I don't see how you can keep him out unless you had a restraining order. In that case, your only option is probably to leave, yourself, or to contact an attorney about separation/divorce proceedings giving you a temporary right to the residence.
Really, at this point you should probably consult a lawyer anyway. You need to have your rights protected.