Styles Spontaneously Change and Disappear

[aga]

I work regularly with document templates that have a number of user-defined
styles as well as table autoformat styles. Usually everything works fine but
once in a while (and really at all is TOO often), our styles become corrupted
and things coded as one style turn into a different style or lose their
formats. We also lose all of our user-defined table autoformat settings in
the entire document.

A few times this has been triggered by deleting unused styles through the
Organizer or through the Styles pane. I have stopped ever deleting styles
because of this. Now, it seems to happen randomly, but I'm wondering if you
know of any action that may be triggering this or any way to prevent it in
the future.

Thanks for any tips!!!

AGA