Continuity mistake: While destroying stuff with the Samurai sword, Jimmy breaks some decoration eggs on the fireplace. When the angle changes they're perfect and he breaks them again.
Continuity mistake: When Devlin goes to open the hatch manually, all the hatchery pods are closed and green in color. However right before that scene we saw the pods were open and were yellow in color.
Continuity mistake: Del Blaine's dress changes throughout the dinner scene at the end from dark blue to black when dancing with Jimmy and back to dark blue again.
Visible crew/equipment: When Clark Devlin first puts the tuxedo on, he tests it out by doing some acrobatic moves. Even without slow motion, you can see its not the actor but some younger gymnast doing the moves.
Continuity mistake: Jackie Chan traps the queen water strider in a glass against Jennifer Love Hewitt's face. Then they are fighting the bad guys, but a long shot shows Jackie spin Jennifer around to knock over several of the baddies and there is no way he could be holding the glass to her face. In the next close up the insect is still in the glass held against Jennifer.
Continuity mistake: Del's dress is completely different from the beginning of the party, not just her shoes. At the beginning of the party, the dress bodice is straight across. After getting into the lab, the bodice is a heart shape, showing cleavage.
Visible crew/equipment: The cable pulling Jackie Chan up the silo is visible.
Chosen answer: Since Del knew that the tuxedo actually belonged to Clark, she most likely thought that the watch and shoes did too.