The exchange rate (Official) has not changed.
What you have is a situation where the online FX quotes are using the parallel market rates which is kinda realistic considering there's no place where you would be able to get these currencies at any other rate except the parallel rates

omesanni:
Hi guys,
I have noticed that the money I have in the POF i submitted in my application is depreciating due to the recent spike in exchange rate. When i submitted my application in June , I had like CAD$16,600 and today with the new exchange rate its like $13,700 and its getting ever so close to that CAD$12,300 for a single applicant. This is really annoying me because all through last year i was monitoring the exchange rate for canadian dollar and it was always around 230-240 dolls even when i submitted my application is was like 237 and now all of a suddent today it rose to 289. I don't even understand why it is rising given that canadian dollar is not in demand in Nigeria like it is with the U.S dollar.

Given all this, is it possible for me to submit an extra POF document to supplement the one I previously submitted?My application status is currently IP1 and i don't want my funds to always be in a situation where it is always sufficient. I am just praying the canadian dollar never reaches the rates of the U.S dollar levels. As long as the rates are under 300, i'll be fine.

Thanks for your anticipated assistance