If your location is not very humid and has occasional breezes or strong winds, the long-fiber sphagnum moss in which the Flytraps are potted, espeically with a plastic mesh pot that has slits in the sides, can dry out quickly and turn from wet to bone dry in a matter of hours, whereas a typical medium in a standard, light colored plastic or styrofoam pot (a styrofoam beverage container with a hole punched in the bottom) can take several days to dry out.
The slower drying time acts as insurance against sudden drying and the death of the plants. If you are away for a day and your Venus Flytrap is outside in direct sunlight and a light breeze, in that pot and in only long-fiber sphagnum moss, the plant could possibly dry to the point of irreversible damage or death, unless it's sitting in a tray of water to keep it saturated, which is also not a good idea (saturated growing medium can encourage fungal infection).
In addition, with such a light medium and light pot, a strong gust of wind might blow the pot over, or might blow it out of the tray of water it sits in, causing it to immediately begin to dry at too fast a rate.
So, repotting into a deeper pot with no slits in the side, and using a standard carnivorous plant growing medium such as 50% sphagnum peat moss (not long-fiber sphagnum) and 50% perlite or silica sand, would probably be a good idea. Good luck.