Deleted Facebook

I could not post to my fb work group because it would return to home screen once I started typing the post. Someone I know recommended deleting fb and reinstalling it. Now lots of things are wrong. Some groups are deleted. And my work group, which many of us post anonymously a few times a week, I no longer even have to option to post anonymously in the group. And the group looks.different, scrolls different, etc. I can post now, but need the anonymous option back!