L1A Validity

[Andupo]

Hi user friends,

I have a unique situational question and below are the details,

1. I have valid L1A extension, however while entering in US last year I had to use my Advance Parole to re-enter in US as I couldn't get stamping dates in india, I would like to know if my L1A is still valid and can I go to Canada and stamp it?

2. Is there a way to extend i94 without leaving US, while entered using AP.

Thanks in advance

Regards,

AP