Todoist seems to persist on every virtual desktop on OS X. Is there a way to remove this behavior and have it live on a single desktop?
Also the Todoist window doesn't seem to respond to the Command+W key to close the window.
Unfortunately, it's not possible to put Todoist only on one desktop, but you can add a request for such feature to our Votebox: http://todoist.com/Vote/
It also doesn't support Command+W right now, but you can close is using the global shortcut CMD+Shift+T.