Replying to Full Tilt Descendant 8 heels?

I just bought a pair of these boots online since they're some of the widest boots on the market and I have wide feet. (I have been riding salomon SPKs for the last 5 years)

While trying them on and goofing around doing nose presses in my living room I can feel the whole liner come off the heel of my boot if I lean really far forward. Is this normal?

To clarify it's not my heel coming off the bottom of the liner, it's the actual liner coming off the bottom. This is with the buckles as tight as they go, this still happens. Is there something else I need to tighten on the boot itself? Thanks!

**This thread was edited on Sep 28th 2017 at 10:51:40pm