I may not need to tell you this but the easiest way to place commonly used objects is to use favorites. Set up one library part exactly the way you want it then save it. If you want new instances of a certain part to behave in a certain way then you need to edit it's parameters within the library part itself. It's also possible to edit the markers themselves to show the way you want them to. I'm not 100% sure exactly what you are trying to do here so if you could explain further I'd like to try and help.
It works here. I suspect that you have the wrong box checked on the Door Size Settings dialogue. You will notice that as you change the checked selection in the "Set as Nominal" section the dimension marker display will change to match.
AC 19 6006 & AC 20
Mac OS 10.11.5
15" Retina MacBook Pro 2.6
27" iMac Retina 5K