so first we fix an height issue aswell as an naming issue in a packet

src/main.lua

@@ -714,14 +714,8 @@ end]]
 local function VP_printstack(buf, dimensions, cx,cy,cz,direction)
     reset()
     move("up")
-    if buf["height"] < cy then
-        for _=1,math.abs(buf["height"]-cy),1 do
-            move("down")
-        end
-    else
-        for _=1,buf["height"]-cy,1 do
-            move("up")
-        end
+    for _=1,buf["height"]-cy,1 do
+        move("up")
     end
     local ox,oz = cx,cz
     cx,cz,direction = VP_moveto(cx+1,cz, cx,cz,direction)
@@ -929,7 +923,7 @@ while true do
                 x,y = VP_selectpos(buf,dimensions,"Select position of turtle "..tostring(v), x,y)
                 rednet.send(v, {
                     cx=x,
-                    cy=y,
+                    cz=y,
                 }, "HB_vprint_pairpossend")
             end
             reset()
@@ -945,7 +939,7 @@ while true do
                 dimensions=dimensions,
                 height=height
             }
-            VP_printstack(ownstack,dimensions, 1,1,1,0)
+            VP_printstack(ownstack,dimensions, 1,0,1,0)
         end
     end
     if action == 4 then
@@ -997,7 +991,7 @@ while true do
             dimensions=dimensions,
             height=height
         }
-        VP_printstack(ownstack,dimensions, cx,1,cz,0)
+        VP_printstack(ownstack,dimensions, cx,0,cz,0)
     end
     if action == 5 then
         shell.run("rm", "main.lua")