Replying to Just bought my 1st pair of boots...

Hey, I just bought my first pair of boots and am not really sure if they are the way they should be.

I bought the Dalbello Krypton Rampage's. I'm 18 and I've been skiing since I'm like 5 and still don't know so much about this stuff other than how to ski.

Anyway, I think they may be to big because when I unbuckle them and walk around, it's like my foot is well in the liner, but the liner is loose within the boot. It moves around, feels like it's gonna slip out and I barely have control over the boot. So once again, it seems as if my foot fits well in the liner, but it seems as if the liner isn't big enough for the boot. This has never happened to me with any boot I've rented and doesn't seem at all normal to me... is it fine?

Anyone have this boot and possibly share the same experience?
I just bought them and the place I bought them (Sport Chalet in La Canada) has a Boot Fit Guarantee for a year. Any ideas on what I can/should do?

Looking foward to your replies!
Thanks in Advance