cart and checkout page currency not changing

our website soojinstylejp.com currently has multi currency app running, you can see the right side widget showing the different currencies enabled. but it has 3 problems

1. auto detect not working, we are in canada but currency stay as default usd

2. after switching to different currencies, cart page and checkout still remain as default usd currency

3. because of 2 cannot accept payment as alternative currency—our payment process is stripe

please advise soon