Order of elements rendered is inverted in sketch
Hi, while working on a test project to render elements, one of my colleagues noticed that the elements rendered in sketch are in inverted order on how they appear on the code.

Given this code:
![code](https://user-images.githubusercontent.com/4756314/28291639-2a9de3be-6b00-11e7-975e-fb4eadfe71e8.png)

One would expect to get a container folder with 3 folders `1`, `2` & `3` in order. but you get this:

![sketch](https://user-images.githubusercontent.com/4756314/28291660-3f2c9a50-6b00-11e7-9c25-0271db8567d7.png)

Any clue why this happens? This is special important when doing symbols and you want to offer configuration pieces it should be in correct order.

The actual rendered elements are in correct order.

**Sketch version:**
45.2
