OK ... I've got four screens (yes, four screens ... bfd).  My docks on the upper and lower portions of all screens work properly.  However, the side docks on all but the primary screen have a strange glitch.  It is applicable to all docks, not just those I have made.

The glitch is as follows:  When I create a side dock and tell OD which of the four screens it is to appear on, all goes well, the dock appears on the appropriate screen and on the correct side of the screen.  However, if I add a spacer, the spacer (and ONLY the spacer) appears on the side of the primary monitor.  Not the monitor on which the dock appears.

Therefore, I have spacers floating all by themselves on my primary monitor, and empty spaces on the docks.

As mentioned, all upper and lower docks work just fine.  The spacers appear on the correct monitor.  It is ONLY the side docks that seem to have the problem.

Also ... a question with regard to side docks generally.  What is the best way to manage side docks on multiple screens??  If I have them "hide off screen", then they just show up on the screen next to that screen ... wich makes things a little cluttered.  Is there some way to make the side docks on inside edges really disappear when they are not in use?  As it is, I only use two side docks, on the outside edges of the outside monitors, and ... as mentioned ... I don't use any spacers on those docks.