I think that the titles are fine and you should not change them from what they actually were. Where you need to put in a lot of effort is into the project descriptions that explain your experience and what you were responsible for.
Have you already reviewed our article on how to fill in the application? Here is a direct link to the experience hours section:
www.project-management-prepcast.com/how-...-the-pmp-application
(there are even some good examples in the next section of the article).
That's where you show PMI what you did in all 5 domains.