Applying for a study permit from the USA. (Russian citiznship)

Hello forum.
Im currently going to college in Boston, MA, USA and finishing up my studies this semester because of the high cost of education... My I-20 says that the usual period of studying is 2 years and it expires on November 1 this year. So i decided to apply for a study permit to Canada cose its considered the cheapest county to study at.
I applied for a 2 month Diploma in Business Communication program because missed deadlines for the college and the program i am interested in. And right now im at the position there i have 2 years of studying in the USA and going to study for 2 months in Canada, but having on my mind that i`ll go to study french after this diploma program ends, than spending a summer and going to start school in September. (I have a letter from the college im interested in on me saying that i applied for **** 4 year program and its in a process)
IM going to the embassy this thursday.. Any suggestions for my situation and what am i suppose to say to the officer?
Im in the USA for 3 years and do not really know what officer is going to say about this..

Also, on my student status here i have no expiration date (Valid for the duration of status). What am i suppose to write into the application form there it says your present status and when it expires?