agreed with crackaddict.
typical symptoms of boots that are too big. If there's enough room your heel is lifting on toe side and then on heelside your foot slides forward and your toes hit the front of the boot, they're probably too big unfortunately.
so check your boot shell size first. you might be able to make them work with high volume liners (to take up the extra room) but better to be in a tighter fitting boot from the get go.
your toes effectively should be touching the front of the liner, but all the time, in a static state where foot is held securely by boot/liner, not sliding foward and getting jammed against the front on heelside turns.