Why are some lists not sorted alphabetically?

When i look through the list of my inbound routes or my extensions, it is obvious that the list (which contains only numbers in my case) is not sorted.

Why is this? It takes me a lot of time now, because i always have to look through the entire list to find a specific extension or inbound route.

It looks like the list is sorted in the order the items were created.

Can i change this behaviour??