Hi Divya,
Since you checked into the steps that Brian mentioned, and you do not have impact checked off there, it seems this could either be a bug, or a separate trigger that is causing this. For this situation, I would recommend opening a support case to have an engineer take a look at it as it may require some tracing on a good and bad example of a document so that we can figure out what is triggering this where we feel it should not be happening. If you do decide to open the support case, please post the support case number here so that we can follow it through.
Thanks,
Jon I.