It’s a classic GetAllOfSomething example ordering issue. 
On top of what ThompsonN13 has mentioned about making an array by hand and plugging objects in 1 by 1, you also have the option to spawn the objects dynamically and add them to an array. This is not always desirable and depends on your workflow, of course. But it will guarantee the order.
You could also use numerical tags and sort it like that but it’s a bit fiddly.