Dropbox icon = checkbox w white interior remains a mystery

Megan from the DropBox staff offered some help to an earlier post entitled "Dropbox icon  and folder status on a Mac” but despite my replies, the discussion went dead seven days ago. I still have outstanding questions and would like to revive the discussion. I have selected the preference that all files and folders be available off-line on my primary MacBook, however, I have a mix of checkboxes, that is to say both kinds… green interior and a white check mark and white interior with a green checkmark.

Below is the explanation link that Megan supplied, but there's no mention of the check mark with white interior, which was puzzling because I had seen but lost another page earlier that included that in the explanations.

In looking at this article about syncing icons and reference was made to the  DropBox desktop app, which aside from the icon that lives next to the Time Machine icon in the upper right menu bar in the Finder, I'm not really sure what the dropbox desktop app is? Yes it appears in the application folder, but if I double click on it, it simply takes me to the designated dropbox folder within my User folder. Which, by the way, except for emergencies, that is the only way I work with DropBox. The primary thing I want to do is faithfully mirror the activity of the Finder “DropBox” folder on the primary MacBook and have the files and folders populate to other devices.

Finally, all my posts from the last month or so started re. puzzling changes to modification dates following a migration from an old MacBook to a new one. In nearly 40 years of using a Macintosh this has been one of the most challenging technical snafus I've ever encountered.

Thanks,

Paul

syncing icons based on this article?