Continuity mistake: While avoiding the glowing meteoroid, they decide to fire their jets to push them into a higher orbit. In a couple of scenes they go up but a third one has them going back down.
Continuity mistake: Mantee finds a pool of water after falling through a hole. He gets in nude, but you can see him wearing tan-colored trunks during the close-ups. However, the far away shots do show him naked.
Answer: In the movie before he discovers his water supply and watches the survival video, he is shown grooming himself and shaving.