Action Map pop() and push() not working correctly

I am quite certain now that I am doing this correctly, as far as I can tell the maps are not being popped. Here is what I have:

function Armor::onMount(%this,%player,%vehicle,%node)
{
   if (%node == 0)  
   {
      %client = %player.getControllingClient();
      %player.setTransform(%vehicle.getDataBlock().mountPointTransform[%node]);
      %player.setActionThread(%vehicle.getDatablock().mountPose[%node],true,true);
      %player.lastWeapon = %player.getMountedImage($WeaponSlot);
 
      echo("The vehicle mapping has been pushed");
      CommandToClient(%client, 'PopActionMap', moveMap);
      CommandToClient(%client, 'PushActionMap',vehicleDriverMap);
 
      %player.unmountImage($WeaponSlot);
      %client.setControlObject(%vehicle);
 
      // Update the camera to start with the player
      echo("This is onMount %client: " @ %client);
      echo("This is onMount %player: " @ %player);
      echo("This is onMount %vehicle: " @ %vehicle);
      echo("This is onMount %node: " @ %node);
 
      %client.camera.setTransform(%vehicle.getEyeTransform());
   }
}
 
function clientCmdPopActionMap(%map)
{
   echo("Popping action map " @ %map);
   %map.pop();
}
 
function clientCmdPushActionMap(%map)
{
   echo("Pushing action map " @ %map);
   %map.push();
}
 
moveMap.bind( keyboard, "e", getIn );
vehicleDriverMap.bind(keyboard, "e", getOut);
 
function getIn( %val )
{
   if ( %val )
      commandToServer('MountVehicle');
}
 
function getOut( %val )
{
   echo("Client getOut function called");
   commandToServer('DismountVehicle');
}

Even though I am seeing this in the consolelog:
Mapping string: PopActionMap to index: 18
Popping action map moveMap
Mapping string: PushActionMap to index: 19
Pushing action map vehicleDriverMap

IT IS NOT CHANGING THE MAPPING!!!

My testing has shown that both maps are present (checked using functions unique to the individual ActionMaps), but the popping never took place because the mapping that should have been replaced, is not.