Seems very strange, havent seen this kind of behavior before. The phone clearly shuts down the backlight but does not lock the screen.

Do you have any application that might have something to do with the settings of the phone (so that some other app sets the locking behavior off) or have you tried removing the widgets from your desktop, because they might somehow "keep the screen alive" even if the you don't touch it. These are wild guesses, because I don't really have any knowledege on the specific maemo settings.

As far as I know, Timenow shouldn't have anything to do with the locking of the screen, as it basically kicks in only after you lock the screen, and then starts polling the proximityd for uncovering.