Hi, i am a newbie to the group and also it is my first time on a non-immigrant O-A, which i got from Canada- few questions- i arrived here Sept 17 and at the airport they stamped me until May 1 2022, my visa says valid from July 29, 2021 until July 28 2022, so do i get 1 yr from July 29, 2021 or 1 yr from when i arrive here, and why did they stamp good until May 1 2022, i think they made a mistake, can i do 90 online reporting i have read it works for some but not others, i live very close to Korat Immigration, and finally can i change my visa to another one so i can teach online to Chinese students from our home. Sorry so many questions, thanks so much in advance, appreciate it very much.