I've noticed many updates to my profile, including publications and job information. I didn't do this myself. Was this done automatically? It would have been nice to be notified; without notification it's kind of creepy.
You probably want to contact the network help desk at ACS.
We recently upgraded the ACS Network and in doing so we had to migrate all of your education, experience, and publication information. We have changed the infrastructure of these types of content, and so the migration probably appears as an update.
Please check to make sure the data (the content) looks the same as it was prior to our upgrade on August 22. If it does not and you think you have been hacked, please let us know.