Following weird accounts

So i've noticed a bug in the accounts im following when viewed from another account, maybe this will help:

My main account following list looks normal to me when viewing the list from the main account
Using my secondary account to check what the main accounts following shows a bunch of users that i dont even know or follow

I've reported this to instagram mutliple times but it still persists and isn't sorted....Any ideas or anyone experienced this themselves?

Thanks

Maybe because of a third-party Instagram application. If you want to remove this third party app login to your Instagram from your web, go to your profile and click edit profile, then click manage applications and then click revoke access to all applications showed there.
Also change your password for extra security.

Good luck!

yeah do what noida says because something isnt right lol revoke access