HH2 Sync Tool working Bi Directionally

We have been using HH2 HR Cloud Service for 3 or 4 years now. Recently we discovered that this was working bi directionally. Meaning a change of the data in HH2 Cloud is updating the data in our Sage Employee Master. I do not believe this was a bi directional sync all along. Has anyone else experienced this process. I have requested a stop option, but HH2 has not cooperated.

Thanks