Huh. You state:

now i want to add info to the line after each word but when i do so the bottom of the page which has a small diagram goes to another page

The fact that it goes to another page means it is being pushed forward.

If I understand it, you have things underlined after the text, and then you want to put text after the word. Well then that underlined IS text, so if you want to put text after the word you must REPLACE (using OverType) that text. If you just put text in after the word then that underlined text is...pushed forward.