When Charlie is first trying pass-code combinations for the tablet, she was hitting 4 digits and then pressing the "OK" button on the bottom right of the tablet to confirm her choice and then she would hear the "wrong pass-code" sound. But in the next scene where she is lying on her bed and trying pass-code combinations, she is hitting 4 digits then getting the "wrong pass-code" sound without ever needing to press the "ok" button to confirm her choice.
When Charlie first reads about Natalie's death on her phone, a tear is shown to streak down from her left eye towards her left temple. In the next cut, she's shown getting up from lying on her right side.
Cliff takes away Charlie's phone in the final confrontation between her, Cliff and Sterling Jr. When they run to Caine's room, the phone is still in Cliff's hand. He never gives it back to her. But minutes later, she gets a call from Sterling senior. And right after that, she destroys the phone that should not be in her possession.