Multiple entry visa valid for only 6 months

[Zayannaq]

I got a multiple entry visa to attend a yearly conference in Canada but it expires within 6 months of the issue date. Why did the VO give such a short validity seeing that the policy says multiple entry visa validity would be granted for 10 years or up to the expiry of the passport?, Or does it mean I can use it up to 10 years but have to get to Canada for the first trip within 6 months?

Did you apply again ???