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