Don't worry about the job status saying "closed". As long as you applied and got the confirmation "thank you for applying" email you're good to go. Don't apply twice!!

Last time around it took a while to get the link to pilot credentials, but you can easily go to the website and setup your profile there ahead of time.

For the résumé upload on the application I just used the résumé wizard and it took a lot of the hassle out. No formatting issues to deal with either