2 users-Same browser

I created a new user in my wordpress site for a new employee to process orders. We setup 2FA on it also. We do use the same computer. Now, when she logs in, I get logged out, normal. But when she logs out, and I try to login, I brings up her account. I’ve cleared cache. Closed/reopend the browser. I’ve tried 2 other different browsers. All same thing. Now, few days later, I’m getting invalid 2FA on my login with my userid and pw in the login box. But it still brings up her login. She’s a shop manager role so I can tell because it doesn’t have as much stuff as I do (admin). What is going on?

Thanks,
Scott