请教8老师和皮匠老师：a follow up question to my AP renewal

8老师和皮匠老师,

Thank you for answering my AP question a couple weeks ago.

I am EB-2 485 pending. And I applied my EAD/AP combo card last year and used it in last summer to come back to usa from China.

After I came back, I recevied a letter from USCIS to indicate my AP case has been denied since my photos are not qualified.

AFter I received suggestion from 8 laoshi, I submit an application to USCIS to renew my AP. Yesterday I received approval notice for my AP renewal. But I found a problem, the issued date on the notice is 03/14/2013 which is the continuous date of my last AP case.

I have question here:

1. Can I use the renewed AP approval notice to reenter to USA if I visit Canada in December 2012. I have paroled stamp in my passport, of course it is from my last entry to USA using the last AP.

2. If I can't, does it mean I am stucked in USA until 03/14/2013.

Thanks a lot, like always.