Sibyline's Cobra staff changes position in her hands during her fight with Evil-Lyn.
King Randor Holds up a piece of paper he received from Sibyline which has disappeared in the next shot he appears in.
At Castle Grayskull, the heroic warriors are standing on the edge of the steps to The Sorceress's throne, with Cringer positioned awkwardly on the side of it's base. In the reverse shot, they are positioned much further back.
He-Man doesn't turn Cringer into Battle Cat, though the latter does appear in the second act.