Teela puts both hands to her mouth, but the background space between her right hand and her face is given a flesh color, making it look like she has six fingers on that hand.
Before falling into the Ice Lord's trap, Adam lifts his sword in an effort to become He-Man with his left hand instead of his usual right. Later when he is seen frozen in place, he is reaching for the sword with his right arm.
As Snowflake escapes from the 'mouth' of Snake Mountain, she appears to be walking on air for a few frames.
When Prince Adam laughs heartily at the very beginning, he does so in the voice of He-Man.
It is never explained how Teela is able to withstand below-freezing temperatures wearing what amounts to no more than a one-piece bathing suit.