These files are saved on a server right?All that little icon is showing is that someone has made those files available offline.When you have highlighted your file go to "File" drop down and take the arrow off "Make folder available offline".Its better though to have them offline that way of your server goes pop,your can still work on your drawing
.Youll notice that PC will have to back them up at the end of the day too,which you may find too annoying.