-Because there is not record about your travel to Canada by using automatic visa revalidation rule, your AP application is OK. As long as USCIS approves your AP, you an use this AP for future travel.
入關時隻能向美國關口出示H1B的批準書和相對應的I-94,我需要對他們回答我正在申請AP嗎?
-No. You just show the CBP officer your h1 approval notice, the valid H1 I-94, the recent 3 month paycheck stubs and your pasport. That i all.