Why have we recently started having the Shipping Charge boxes add themselves into our invoices even though we turned that option off? I checked and it's still turned off.

Hello missrachelstudio,

I've confirmed that there has been an on-going issue about this. Some customers have reported that they're seeing the Shipping to field even if it's already turned off in the company settings. 

There's currently no workaround for this. However, we will let you know once it's resolved by posting the update on this thread.

If you need anything else, don't hesitate to post it here.