A* Pathfinding headaches

This topic was started in this thread:
www.torquepowered.com/community/forums/viewthread/118609
But the issue is no longer about the tile custom data.

I can get the AStarDemo to work. That's no big deal. The problem starts when I try to apply these methods to my own grid. I want to click a spot on the grid and have the player move to that spot using A* pathfinding. So far the player moves toward the target but stops at least 1 node short of the destination. Sometimes it only moves to number 2 node out of 5. Here are the relevant functions with echo data:

function aStarActor::onPositionTarget(%this)
{
   // we're at our target, time to move to next node
   // first, check to make sure we're not finished with our destination
   if (%this.currentPathNodeIndex == %this.lastAStarNodeIndex)
   {
      // we've reached destination!
      %this.onAStarDestinationReached();
      return;
   }
   // increment to our next node
   if (isObject(%this.currentPath) )
   {
     %this.currentPathNodeIndex++;
     %this.moveToAStarNode(%this.currentPathNodeIndex);
echo ("aStarActor::onPositionTarget: "@%this.currentPathNodeIndex SPC %this.lastAStarNodeIndex);
   }
   else
   {
      // allow a hook if desired to track a path disappearing out from underneath us
      // %this.noPathExists();
   }
}

function aStarActor::moveToAStarNode(%this, %nodeIndex)
{
   if (!isObject(%this) )
   {
      // we shouldn't be attempting to move as an aStarActor if we aren't a valid object
      error("aStarActor (" @ %this @ ") in game but not object, how?");//never gets here
      return;
   }
   if (!isObject(%this.currentPath) )
   {
      // we shouldn't be attempting to move to an aStar node if we don't have a path
      error("aStarActor (" @ %this @ ") without a path");//never gets here
      return;
   }

     // getNodeWorldCoords(%index) is a ConsoleMethod on the pathAStar2d class
     %nodeWorldCoords = %this.currentPath.getNodeWorldCoords(%nodeIndex);
     if (%nodeWorldCoords $= "InvalidNode")
     {
        %this.noPathExists();
        echo("aStarActor::moveToAStarNode: no path");//never gets here
     }
     else
     {
       %this.moveTo(%nodeWorldCoords,
                  %this.moveSpeed,     // speed
                  false,  // stop?
                  true,   // callback?
                  false,  // snap?
                  0.8     // margin
                  );
echo("aStarActor::moveToAStarNode: "@%nodeWorldCoords);
     }

}

console output example 1:

findDestination: -20.969 -47.418
aStarActor::moveToAStarNode: -17.499992 -22.500015
aStarActor::moveToAStarNode: -17.499992 -22.500015
aStarActor::onPositionTarget: 1 3
aStarActor::moveToAStarNode: -17.499992 -42.500015
aStarActor::onPositionTarget: 2 3

example 2:

findDestination: -24.699 -48.544
aStarActor::moveToAStarNode: 2.500009 -37.500000
aStarActor::moveToAStarNode: 2.500009 -37.500000
aStarActor::onPositionTarget: 1 5
aStarActor::moveToAStarNode: -2.499991 -37.500000
aStarActor::onPositionTarget: 2 5
aStarActor::moveToAStarNode: -7.499991 -42.500015
aStarActor::onPositionTarget: 3 5
aStarActor::moveToAStarNode: -17.499992 -42.500015
aStarActor::onPositionTarget: 4 5

Here's an example where it does get to the last node, but the actor is well short of the destination:

findDestination: 25.750 -21.943
aStarActor::moveToAStarNode: 7.500010 -22.500015
aStarActor::moveToAStarNode: 7.500010 -22.500015
aStarActor::onPositionTarget: 1 2
aStarActor::moveToAStarNode: 27.500010 -22.500015
aStarActor::onPositionTarget: 2 2

Every tile in the grid has custom data set to zero.

Any ideas or troubleshooting suggestions?