newly acquired i believe is the key to this mystery....
often times, flytraps (especially this late in the season) are beginning to slow down for winter growth, and older traps who have been sprung a few times already, are not the way they "should be"....
as light decreases, and temperatures drop as well, they lose much of the vigour exhibited during late spring and through summer....and to add on, it was just brought into a new home...
more than likely, at the turn around of next growing season, the plants will resume the normal habit of crossing the teeth before forming a seal...
i will add in, what i see in the photo on the main leaf, is a bit of a fringed edge, which can show a lack of light, IE etiolation, which isnt all too uncommon for young plants, or even plants getting ready for dormancy which still had a few leaves to push out....