According to OP6 you can claim additional points as long as you submit additional document before any desicion has been made here is the link...see page 23 of this link..
http://www.cic.gc.ca/english/resources/manuals/op/op06-eng.pdf
Note: Any documents received and added to the file prior to the date of the letter, regardless of whether
or not the 120 days have elapsed, must be considered. Visa offices cannot refuse to consider
submissions made after 120 days, if the letters in either Appendix D or E have not been sent. It is
therefore important to produce the BF reports, make the final determination of eligibility and send the
letters promptly.