Function doMoveTo help

[perdigs]

I need a help in this script to function...this function get position and send the uid to this pos by calculating the route, but this function have a bug.

The bug is sent uid for all directions NORTH SOUTH, WEST, EAST, NORTHWEST, SOUTWEST...

The code is...

-- ORDER System
    function doMoveTo(cid, pos)
        local creature = cid
        local pokepos = getCreaturePosition(cid)
        local ir = pos

        if pokepos.x == ir.x and pokepos.y == ir.y then 
            return true
        end 
        if pokepos.x ~= ir.x or pokepos.y ~= ir.y then
            if(pokepos.y - ir.y) >= 1 then
                doPushCreature(creature, NORTH, pokepos.y - ir.y)
            end
        if(ir.y - pokepos.y) >= 1 then
            doPushCreature(creature, SOUTH, ir.y - pokepos.y)
        end
        if(pokepos.x - ir.x) >= 1 then
            doPushCreature(creature, WEST, pokepos.x - ir.x)
        end
        if(ir.x - pokepos.x) >= 1 then
            doPushCreature(creature, EAST, ir.x - pokepos.x)
        end
    return false
    end
end

use other function doPushCreature...i need a help to uid walk to NORTH, SOUTH, EAST AND WEST, only go to NORTHWAEST, or SOUTHWEST... in this example

http://img577.imageshack.us/i/77653426.png/

look the img the point A have brushs and to go to the target player need walk in SOUTHWEST to past to this brushs in the point B the player dont need to go to NORTHWEST direction to past, but the bug makes the player to northwest direction i need a change to player go north and after to west...
Plz help me THKS