Once the court gets involved I.C.E. can't deport anyone until a judge issues an order of deportation. As soon as an attorney files an appeal the hole thing is on hold until the appeal is heard. The courts are backlogged so the immigration attorneys use the appeal process as a stall to keep the person in the country as long as possible. Then the tell the court, "You let them stay here for x numbers of years and it would be cruel to sent them home now." They need more judges to clear the backlog and get the system back on track so it doesn't take years to get rid of them.