Reply To: Don't want paragraph spacing after every paragrah

First: Open Indesign, but do not open any document. Edit the “basic” para style (the only one available) and look for the spacing before or after. Be sure this is set to zero. Save the style. When you open a new doc, the para style should be oke again.
Second: If you didn’t create styles, all text is put in the same “basic” para style, so in your case with a “space after”.
When you want only the title to be followed by a space, create a new style, make the space after you want, save the style and apply it to all the titles you want. All the other text will stay in the “basic” style.