I've updated the capx again, adding in scrolling for the object layer and locking the hud:
https://www.dropbox.com/s/vl30jbms1ucpf ... .capx?dl=0
Instead of creating and destroying the picked object I just set it visible and invisible as needed.
To keep the picked object on the mouse I set its position to mouse.X("picked"), mouse.Y("picked"), which means that it follows the mouse's position relative to the "picked" layer.
I added now run the check to avoid spawning objects on the inventory against the inventoryFrame object rather than the inventory objects.
Lastly, I swapped the names of the animations to their respective colour, rather than "one","two" etc, so that the picked text is less confusing.
Notice that the both the "picked" and "inventory" layers have parallax 0,0.