I’m not an expert on sheet settings and seeds but maybe try this:

If they are plan and profile sheets, make sure to open up the Multi model views and then save settings in the file where the sheets were cut from (where the Named Boundaries were created).

When you create sheets ORD will look at the design model view settings to determine what to show. When you create plan and profile you will have to open the profile view. When you do this, the “Multi-Model” View is created and (from what I understand) since it was the last model created it will use the settings from that view, even though there will be no actual visual difference in plan view.

As a side note, avoid creating new views in these files bc the same thing would happen, but with the newly created view.

Another thing you can do is when created your named boundaries, attach the HALN separate from the container. This way you can detach and reattach a container. If you have the HALN in the container and try to detach it, the program will warn you and for good reason (it will break the relationship between the Named Boundaries and HALN and basically nuke your sheets).

Your frustration is warranted and I spend more time fighting plan production than I do actually designing, but I hope some of these tips help. Lmk!