ANNOYED – Instagram Review

I have two accounts and for some reason after I got the newest update, it has been messing up Whenever I try to post something on my 2nd account, it posts on my main. Even when I try to use direct messages, follow people, post a story, and like other posts. I’ve tried logging out of one but still somehow posts on the other. How do I fix this?
Review by Banginghard on Instagram.