Endnote Sync Issues

I’m using Endnote X7 on both a Mac and PC and am trying to sync the libraries between the two computers.  At first it worked fine, but now new folders and groups I created in Endnote X7 - Mac are not transfering over to the PC side.  The group sets I created did, but the individual folders within those sets did not.  Any thoughts on how to deal with this?  I also use endnote on my iPad, and those folders are syncing to the iPad.