Normally understaking is 2 years( for the ones who are supposed to pass through it).Given that some people have been doing mariage for just getting in Canada, and once here they use to divorce, Immigration decided to put the 2 years mandatory.known as undertaking period.in that period you should continue to live together as spouses,or commonlaw partners and if you divorce for example in that period, the residence of sponsored person is nullified.I don't know really why they wrote 36 months.or maybe they include one year you will have to wait until your process is done.I have no Idea.
by that time you applied for notes your security check was not yet done.
Your spouse had passed medical step.meaning she has no health issue that can be a threat to the nation as from the results you submitted.
Security1 and Criminarity 1 refer to whether she has criminarity history also about being a threat to the nation in terms of security, however I do not know how they grade this like 1 I do not know what it meeans.
Obviously it's logic. that you got the email saying that your file was done for review, because these notes were of a few weeks earlier(when they were still reviewing your file).
I believe you should have a PPR soon. however, given of the due date in the file(January/2016). maybe they might also make your file wait more few months .you know these things have no formula.only immigration knows.I saw some people for Nairobi getting done in 6 months others in 8 others 1 year.
All the ebst my brother. we are all waiting as well.