Thanks for all the replies. I also called the HHonors center and played dumb, only giving my name, staying hotel and date. The rep was able to locate my reservation and add my number in. I was able to see my reservation in the online account but if you try to click the link to see any details, nothing showed up but an error saying they can't find it.

BTW, my experience at this Hilton City Center (salt lake city) totally sucks. Well, maybe I'm just a silver, but hey, the guy at front desk was acting like a robot. No warm welcome attitude when checking in, and when I asked if there's any goodies for being a silver, he simply said not here. The worst part is me and my wife got a room with two twin beds and a tiny bath room. I called to change the room for a One-bed ( I said no matter king or queen, as long as it has a bigger one bed) room, he was like sorry we were out.

Nothing is free here except the morning paper.