It is definitely one way to do that and I believe this works with the point of entry officers. There are a few things to consider though. Not every company would allow you to buy 2 separate 1 year policies. First of all, if you have any claims during the first year your second policy will most likely be void. Then you will not be able to renew the policy and will have to apply with a different company. Usually in situations like these there is going to be a waiting period ranging from 48 hours to a week.
Also, if there was a claim during your first year you will have to get coverage for preexisting condition which will be more expensive for a new policy. Of course you can just choose not to cover that but it might be dangerous.
If you have a chance get a 2 year policy to cover any future complications.
See the posting above for more information, there is a page on IEC/ Working Holiday