Isle of Conquest Question

While playing Isle of Conquest today(Horde) I noticed the alliance can take the glaive thrower and other vehicles right to the front door of the keep and shoot at the bottom of the floor were the Horde boss is. The boss went down so fast it was over within a couple minutes of our gate going down. The placement of the Alliance boss is much different and I’ve never seen Horde take a glaive thrower and try to shoot through the wall. Has anyone else seen this? Is this normal?