I'm reviewing a large document with times converted from 24 to 12 hour time with many repeats and when it autopropagates it adds "AM" or "PM" all on its own before "a.m." or even "p.m." so it autopropagates incorrectly for instance 10:55 to "10:55 AM a.m." There is nothing untoward in options settings. How can I stop this please?