Rock Climb working wonky

[Black Temple Gaurdian]

So I've been playing around getting a version of Rock Climb to work, and I've come up with the following:

def Kernel.pbNERockwall(event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  event.move_right
  event.move_speed = 2
  loop do
    event.move_right
    event.move_up
    terrain = pbGetTerrainTag(event)
    break if !PBTerrain.isRockwall?(terrain)
  end
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end

def Kernel.pbSERockwall(event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  event.move_right
  event.move_speed = 2
  loop do
    event.move_down
    event.move_right
    terrain = pbGetTerrainTag(event)
    break if !PBTerrain.isRockwall?(terrain)
  end
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end

def Kernel.pbSWRockwall(event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  event.move_left
  event.move_speed = 2
  loop do
    event.move_down
    event.move_left
    terrain = pbGetTerrainTag(event)
    break if !PBTerrain.isRockwall?(terrain)
  end
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end

def Kernel.pbNWRockwall(event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  event.move_left
  event.move_speed = 2
  loop do
    event.move_up
    event.move_left
    terrain = pbGetTerrainTag(event)
    break if !PBTerrain.isRockwall?(terrain)
  end
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end

The problem is, the first movement before the loop just... doesn't occur. Thus the character ends up off by a tile.

Update: Swapping the first one to "Kernel.pbJumpToward" works, now I just need to figure out how to get it move off without moving up/down too.

Update 2: Changed the code to include a length variable, but there's now a new issue: Going up and left is fine, works perfectly. Going down and right, they go down one step, then jumps to the final destination.

def Kernel.pbNERockwall(i,event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  Kernel.pbJumpToward
  event.move_speed = 2
  loop do
    event.move_right
    event.move_up
    i=i-1
    break if i<2
  end
  Kernel.pbJumpToward
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end

def Kernel.pbSERockwall(i,event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  Kernel.pbJumpToward
  event.move_speed = 2
  loop do
    event.move_down
    event.move_right
    i=i-1
    break if i<2
  end
  Kernel.pbJumpToward
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end

def Kernel.pbSWRockwall(i,event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  Kernel.pbJumpToward
  event.move_speed = 2
  loop do
    event.move_down
    event.move_left
    i=i-1
    break if i<2
  end
  Kernel.pbJumpToward
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end

def Kernel.pbNWRockwall(i,event=nil)
  event = $game_player if !event
  return if !event
  oldthrough   = event.through
  oldmovespeed = event.move_speed
  terrain = Kernel.pbFacingTerrainTag
  return if !PBTerrain.isRockwall?(terrain)
  event.through = true
  Kernel.pbJumpToward
  event.move_speed = 2
  loop do
    event.move_up
    event.move_left
    i=i-1
    break if i<2
  end
  Kernel.pbJumpToward
  event.through    = oldthrough
  event.move_speed = oldmovespeed
end