Insertion point in tree

[StephenUK]

I have recently imported some long lists of items and need to be able to insert new items at particular points in the explorer tree.

I find that when using the insert sibling command, sometimes the new sibling appears beneath the one above (which is what I want), but on other occasions the new sibling appears at the bottom of the list.

In short lists this is unimportant, but in longer ones it is frustrating.

Does it have to do with whether the list has been sorted alphabetically?