When I press the 'follow' button on Instagram, it automatically unfollows. How do I fix this?

[Kenna]

When I press the 'follow' button on Instagram, it automatically unfollows. How do I fix this?
I tried following my friend On instagram. I unfollowed her 3 months ago. When she found out I unfollowed her, she unfollowed me in return . I never really talked to her before that either. And today , she asked me why I unfollowed her on Facebook. I told her i didn't know and that I would follow her again. I got home, and I tried to follow her. It wouldn't let me. Her account is private, and instead of saying "this user is private" where her pictures go, it's says "no posts yet" but it says on her profile that she has 200 photos. I'm confused. Please help

[Crystal]

See if your mouse works correctly because I face such thing when my mouse double click at times