Just don't be consumed by this one little thing that it brings a distraction to your "service" to the Kingdom in the walk of administration.
I agree, it sounds country, (just an opinion)---but then again, it's just unknown to us at this time. Saying Brother John instead of Pastor Doe (a full time pastor), is strange to me, but very common with my friends of other cultures. I can only hope that people don't take his authority any different as pastor, and catch that spirit of familiarity.
If its your responsibility to put the document together, and they are serious, play around with it and show them what it really looks like:
Teacher Jane Doe
Teacher Jane Doe, Facilitator
Minister Jane Doe, Teacher
Minister Jane Doe, Facilitator
Just a suggestion, or do what I typically do, make the correction and send it as a PDF, none of my people have the real acrobat where they can edit the document

. Better yet, get it done and have it copied

Nothing wrong with desiring excellence! We should all strive for it. Just because you're "country," doesn't mean you can't have the appearance of perfection(I'm a real country girl who was raised to speak well and proper, sadly, people awesome you are stuck up or think you are better than them because of it). My dad's members for example, were/are ghetto fabulous! With training and teaching (constantly, people grew and ministry evolves and new people come, so the process starts all over again), they may be ghetto at heart, but they know how to stand and walk in excellence when its time to step up.