Board Thread:Support Requests - Getting Started/@comment-24217012-20150228184622/@comment-452-20150301190104

I assume that you're using the "classic rich-text editor", and they were automatically changed when you edited.

Incidentally, it is bad practice to use a bunch of BR tags in a row like that.

In general,    should be used to clear elements. Some wikis include clear for the same purpose.

When you don't want content to flow around a gallery specifically, then the gallery should be center positioned.