Netlist Property Transfer During Design Sync

I'm pretty sure my issue has to do with Occurrences vs Instances, but I'm not sure how to go about fixing it.  This is a simple, flat design.  I'm having an issue with pushing net properties from capture to layout. I have properties that seem to be there in the schematic, but don't transfer to the layout, i.e. I don't see them in Constraint Manager.

In Capture:

- If I double-click a net in the schematic, it shows me the proper values I have entered for NET_PHYSICAL_TYPE and NET_SPACING_TYPE.

- If I choose Edit->Browse->Nets->Instances, I get a warning that this isn't the preferred mode for this design, but I see the proper values just like I did when I double-clicked the net in the schematic. 

It seems Capture is exporting the Occurrences properties when netlisting/syncing, but the values I'm entering, and want propagated, are showing up under Instances.  I'll admit, Occurrences vs Instances has always had me more than a little confused.  I don't recall making the decision of Occurrences vs Instances when my project started, but it appears my design is in Occurrences Mode.  Can I change that somehow, so that the project is in Instances Mode and thus the netlister will choose the Instance properties?  If I do something like this, will it totally mess up the sync with my near complete layout?  Any other ideas about what's going on here?

Thanks,

Mark