mate, your at last chance saloon right now considering you are 35 and time is really against you.
you had a healthy 459 to begin with, no idea why you had to create a profile saying that your spouse is "non-accompanying" (well other than the fact that you wanted that sweet ita asap and the score bump you got for not including your spouse), so yep i am sure this fact would not be lost on the ircc official, and yes you can push your luck and try explaining and what not, but do you really want to do all this at this point in time??/
the ircc officer may or may not accept your application after a lot of deliberation (we are talking atleast three to four months here ) as your basically trying to edit your profile, and at the end of it all the officer might rescind your ita, and i really dont want you to lose this chance in life due to this.
so for gods sake just decline your ita and get into the pool asap and this time dont go for the "non-accompanying" spouse option, and iam pretty sure your should get a " zero complication " ITA within the next draw or two.
and btw mate, the ircc directive regarding including your spouse after ita applies only to thise ppl who were nto married when they received their ita and they have this convenient option of including their spouse after ita and before e-apr.
this doesnt apply to ppl who change their minds after the fact, i wouldnt call it mis-representation but rather you getting a bad deal, so you eitehr fight for a better deal and wait it out and you may or may not get a better deal or you withdraw your bad offer on the table and get a better deal in the next draw or two (i.e an ita which includes your wife)
cheers
(And a word of advice to all those ppl going for the non-accompanying spuse option for that sweet sweet ita, pleae think this through as its not easy at all to get your spuse to canada after you land, and we are talking years here, many a family has got destroyed because of this, and i feel its just not worth it all.)