Canadian Citizen, H1B extension in progress, previous H1 expired, rules of travel?

[Mum2Can]

Congratulations. thanks for sharing your inputs in the forum. By the way, a small correction here, the office that you are visiting in the border is not USCIS office.,its a CBP office. CBP and USCIS are different bodies.

Thanks for the catch. I have corrected in the original post to avoid confusion.