Instagram posts shared to personal FB account, even though set to business page - help?

[AC Question]

I have an Samsung S7Edge. In Instagram, I have set my account to post to my business page, and in the settings, it clearly shows so, but when I share a post it shows up on my personal account page. Can anyone help me out as to why this is happening and how to fix it? I have already uninstalled and reinstalled both Instagram and FB apps, and inputted the settings again. Both FB Business page and Instagram show that they are linked appropriately.

Help?

 

[Rukbat]

Facebook went through that a while back, and I thought what I read said that they stopped it for good. It sounds as if it's part of FB's "information sharing to make more money" without a clear opt-in as opposed to their old flash-on-the-screen-for-a-second opt-out.