[Tycho]

Well, I come back home too late this night, don't have time for this.
But now, when I look over your screenshot, maybe I know where is your mistake!

Maybe, you connect the new item to the ParentID=0x3FF00000 (item 343)?
Yes, in my example it is child to the 0x3FF00000, but it is different case.
Now look close to your case. This item, 343 is a type = menu group, and it is stationar, and from my point of view - completely redundant.
Your draggable element is the next item 0x3FF00006, and all other chrono element (Arrow, Glass...) are probably connected to it.
So, what happen maybe is this:
When you drag your chrono in the game, the 0x3FF00006 and all its children are moving.
0x3FF00000 is not child to the draggable item, but opposite, it is a parent to the 0x3FF00006, but this don't make it draggable.
It stay on its position and only define the original position of the chrono, before you start dragging it.
Now if you connect the required new item to the 0x3FF00000, then it also will be stationar and stay on position.

So, try it again, but this time make it next after 344, and make its ParentID=0x3FF00006
If still don't happen, then tomorrow night I will do it!