I think he means that it is duplicated on the same monitor taskbar like this: See how evernote and itunes both show up twice when the program windows are open? When the program windows are closed the duplicate icons will go away. We need to figure out how to do away with the duplicates when the programs are launched.
It will work fine, just make sure you do constant backups, like anyone normally should under any computer set up. I usually do a local nightly backup and monthly backup alongside cloud based real time backup.