By the way, yes, if the only two versions you use in spoken language are “miss” and “missus”, then sure, call every woman “missus”. Way more people will be offended by “miss” than by “missus”. (And more will be offended by “missus” than by “mizz”.)
I can’t recall hearing any female over the age of 13 called “miss” since I was a child. It’s still used in writing, on formal invitations, sometimes. (Although mostly for children) But that title has pretty much disappeared since the advent of “Ms”, at least in my experience.