Facebook seems to choose to show you what it thinks are "hottest", but can you choose to view friends' and groups' posts sorted by "latest"?
Yes, you can choose to see Most Recent posts on you News Feed.
From Facebook Help Center:
By default, News Feed shows the most popular posts first. To temporarily view stories by most recent:
- Click Home at the top of Facebook.
- Hover over the News Feed tab in the left side menu and click on three dot (...) .
- Select Most Recent.
Learn the difference between viewing News Feed by top stories and most recent.
You can view posts by most recent, but News Feed will eventually return to its default setting.