CacheAsBitamp bug?

[GBear]

hi.


Create Sprite1 (size:100, 100), (position:x:0y:0and set CacheAsBitmap = true

Create Sprite2 (size:50, 50) and set CacheAsBitmap = true;;

add Sprite2 on Sprite1 and set position(x:30, 30);

Create Sprite3 (size::10, 10) 

add Sprite3 on Sprite2 and set position(x:0, -30);

Sprite2 Position position will be (30, 60);

is this normal?

 

if Sprite2 set CacheAsBitmap = false;, it is not happened;