AutoCAD MEP

[#1]

I am having a very serious problem that is costing me a tremendous amount of time while I am up against a hard deadline.

I have a number of Construct Drawings with custom routing and display preferences.

The routing and display preferences are perfect until I xref them to a sheet, either view the VIEWS function or directly into a model.  Then the custom settings vanish and all the single line connectors that I had set not to display suddenly return.

What is going on?

[#2]

Interestingly, when I go to REFEDIT, the connectors disappear, just like I want them to and just like in the original drawing.  When I close REFEDIT the connectors return.