let's say I have:

- a Reuse Block 'A'. 'A' has NetPorts for power & ground, and various nets (eg. '$1N10670') between its components

- a board 'B', with power & ground

if I add 2 copies of the Reuse Block 'A' to board 'B' I get 2 copies of each of A's nets on the PCB (eg. 2 copies of '$1N10670').

- I get ratlines telling me I need to join power & ground, this is good - that's the purpose of NetPorts, right?

- but I also get ratlines (and DRC errors) telling me I need to join the two instances of '$1N10670' together. I don't want this. I need the internal nets of each copy of A to be independent.

how do I control which nets are to be connected (eg. power & ground), and which are to be separate (eg, '$1N10670') ?

I had assumed that nets connected to NetPorts would be common, and other nets would be separate. but this doesn't seem to be the case. I also see mention of 'prefixes' in the docs, but I can't find anything about that in the UI.

on a possibly-related note: it seems that the designators for the two instances of A are duplicated, also (eg. 2 copies of 'R27'). this causes issus during component placement in PBCA.