Every time you create a specific page title and then delete that page you are prompting the software to add the number to the title the next time you create another one. You cannot change this. You deleted two others and the one that’s there now has this URL http://julianadeitch.wordpress.com/resume-3/
You can change this. You haven’t deleted the previous pages, you have only sent them to trash. Go to Pages > All Pages, click Trash, hover over each page title, click Delete Permanently. Then go to Pages > All Pages, hover over the currently published “resume” page, click Quick Edit, correct the slug, click Update.