My CIC says:
* Application status: We are processing your application. We will send you a message when there is an update or if we need more information from you.
* Review of eligibility: We are reviewing whether you meet the eligibility requirements.
* Review of medical results: You passed the medical exam.
* Review of additional documents: We need more documents to continue processing your application. We will send you a message with more details.
* Interview: You do not need an interview. We will send you a message if this changes.
* Biometrics: We do not need your fingerprints. We will send you a message if this changes.
* Background check: Not applicable.
* Final decision: Your application is in progress. We will send you a message once the final decision has been made.
There is a glitch with My CIC because in the additional documents field, it says "We need more documents to continue processing your application. We will send you a message with more details." Although I haven't received any message, this has been reported in this thread:
http://www.canadavisa.com/canada-immigration-discussion-board/threads/additional-documents-status-changed-any-insights.507392/