Why are some of my Dropbox files not showing in File Explorer (Windows)?

Hi, yes, everything shows that it should be synced on this computer. On the right I've circled two files added to the Dropbox folder, created in Dropbox (FE view) on the originating computer (the way I've done it for years, so there's no problem there). They show to be synced / up to date from all possible remarks in Dropbox or on my other devices. The FE view was clicked  directly through the Dropbox tray icon. The arrows show where the folder should be and where it is on every other device I've checked. If I view online--the globe--the folder is there. This is not a file I've chosen to leave unsynced to my hard drive copy. I have no internet problems--this has gone on for days. This is a file I created with my own system and preferences--from a file template I always use--not one I was sent wholesale by my client. I've checked to make sure that template file wasn't told by mistake not to sync on this computer as I was cleaning out old files. I've made files recently that work fine, so I can create a replacement file; I just don't want this to happen again. Thank you!