RC2: (fixed) edit> group objects - major bug

I selected 6 t2dStaticSprites, and selected Edit menu > Group objects. Then I looked at the Project tab > Object tree, and though something was amiss because the sprites were shown twice: once inside the new t2dSceneObjectGroup, and once at the top level of the t2dSceneGraph. (same id# appeared twice in the listing). Then restarted TGB and reloaded the level, and now the sprites are all duplicated. In otherwords just grouping the sprites caused a doubling of the sprites, but not until the level was re-loaded.