So, is it against JL's terms if I confirm myself on another flight on the same day? There is availability of an earlier flight and I can ticket it with flexible condition, will it automatically cancel my waitlist if JL does a system scan/sweep? If it's OK I'd like to book it as backup and then cancel when waitlist clears.
http://www.flyertalk.com/forum/28225757-post386.html
Have you read what I posted? The rules seem pretty clear to me.