When Abbey first sees the sword in the stone it is hilt up, when she grabs it, it is hilt down.
Although the stone creature is referred to as a "Gargoyle", this is a common mistake. The correct word would be a "Grotesque", as a "Gargoyle" is a water spout made to look like a monster. Not a statue of a winged monster.
When Abbie approaches the entrance to the cave she raises her hand, ostensibly to shield her eyes from the sun's glare. However she positions the shadow on her forehead, where it can do no good, not actually over her eyes.
When Jenny, Corbin and Sophie realize they need to find a way to turn the gargoyle back to stone, Jenny apparently forgets that she still has the gorgon's head for exactly such an occasion, even though she nearly used it on Frank when Henry had hold of his soul.