I think this is a red flag, but it wouldn't hurt to give the benefit of the doubt here and just hop on a call and ask what is this CEO title about. Just listen

I think this is a red flag, but it wouldn't hurt to give the benefit of the doubt here and just hop on a call and ask what is this CEO title about. Just listen intently and see what they have to say. If you can't confront a cofounder about shit like this, then it's not worth the business marriage.