Jenelle Evans and David Eason are back in a North Carolina courthouse fighting to get custody of their children -- but the fact they're doing it together might be their biggest hurdle. Also, Nipsey Hussle's first baby mama will object to the appointment of the rapper's brother to administer his estate, and might even ask that SHE be appointed administrator, if the hearing goes down as planned, and millions of dollars are on the line ... sources connected to the case tell TMZ.