I was just approved for this card yesterday with the 30,000 mile bonus after the first purchase. Come to find out there was a more lucrative 40,000 mile offer on the website! They are telling me I would have to re-apply for the card and cancel this one. (another HP as well) Anyone ever have luck with getting them to swap promos? I don't want to sacrifice a HP for an app that was just processed.
I was told I would need to speak to an analyst as well since the system would auto-kick out the app. With all of my new accounts I'm certain I'd be burned and have nothing. I may just keep the 30k one, but I figured I'd reach out to the myfico gurus first! 
Barclays just makes everything impossible and difficult to do. I think one person got the 10,000 miles as a goodwill adjustment but most are shot down.
I'll PM you a thread that discusses this issue but you can also try the online messaging option or even twitter/facebook which seem to be more senior reps.
Never thought about social media. I just tried 3-4 reps and no go. 
I'll try twitter as a last ditch and call it a day if it doesn't pan out. I've already decided that I won't sacrifice another HP. Thanks for the tips!