Factual error: Her name is wrong. In Russia if your father's last name is Chenkov but you are female, then your last name would be Chenkova.
Continuity mistake: When Salt and Winter are fighting with each other in the bunker, she stabs a sharp object like a pen in his right upper chest, which stains his shirt red. When medical aid is being given to him, his shirt is clean at the spot and no wound can be seen. (01:27:36 - 01:28:50)
Answer: She stole it as well.