The theme doesn’t natively support WP-Paginate. You can still make it work if you want by editing the index.php template.
Instead, Asteroid theme supports WP-Pagenavi which is a different plugin but is more up-to-date. It works perfectly fine as you can see here on my blog. I also suggest removing the stuff you added on functions.php
I think you’re the first fellow filipino to use the theme 🙂