The problem of the new page I guess that is simply that you must → to move the cursor after the new page line.
what is the purpose of this IDE if you can't do whatever you want?
Error. The purpose of this IDE (and LaTeX) is not that, but allow you to write documents in a consistent and elegant format.
If you edit your question and type something, you will note that added extra spaces and extra blank lines are ignored in the output. This is to maintain a consistent page layout of the web page.
LyX act similarly, but instead of ignoring your wrong decision at the output, ignore the input, to teach you that is wrong ...
- Add more than one space between words.
- force blank lines between paragraphs.
- Indent (or not indent) manually a paragraph.
- Put the authors before of the title.
- etc.
Some of these actions are often careless mistakes when typing, or worse, naive attempts to control document layout like in a typewriter of the XIX century. LyX help in the first case, reverting the mistakes, and in the second case teach you that what you are trying is a job for LaTeX, not for the user.
This mean that you cannot change the layout? Not at all. For instance, You can fix the spaces among all paragraphs automatically, and you can add some vertical spacers manually, but not accidentally as pressing Enter twice by error.