Sounds like something triggered the trap but managed to escape!
Concerning the D. capensis, break the root off if it is an inch or so long,
and you will have another plant in a few weeks. (just stick it in the peat
between the peat and the edje of the pot) The "carrots" will continue to
grow and reach the peat, but you can also just repot it if you thing it looks
unsightly. Quite easy, don't you think?
Take care keep on growing,
-Tom- & Krissy