DWG FILES asking to save, then throw away settings

Good day,
I have a question in connection with dwg files, in our line of work we work a lot with dwg files from our clients, and the problem that I have is, as I'm working on this file it asks me to save every so often. Even though my settings are set to automatically save and save on exit. But that not being the biggest problem, when it saves it throws away all the settings that I was busy with, for example, I have matched the text style, as soon as it has saved that setting is gone and I have to start all over. Is there a way, setting that I can change that might eliminate this problem?