HTML script sections in a page

HTML script sections in a page

Hi,
 
when creating a page, I added several HTML sections one after another. each section containing a table with pictures and text. At some point I wanted to add one section at the top but the insert HTLM function did not seem to find a spot to add this new HTML section right at the top. My reaction to this was to switch to free flow scripting, add a few lines at the top (to create a space), save and go back to script builder mode.
 
The result is that the builder lost track of the different html sections and combined everything into a single, very large HTML section, which is not edditable in the same way each one was originally.
 
So, I have two questions:
 
1.- how do I keep HTML sections separated, I mean, editable independenttly?
2.- how can I get the script builder to add a new HTML sections at the top when there is already content in the page?
 
thanks a lot
Regards
Luis