I don't understand the problem you are having but I can explain how the switchboard manager works. When you start the wizard, it looks to see if the [Switchboard Items] table or the [Switchboard] form already exist. If neither exists, the wizard creates them both. The form is static and unless you actually modify it will be identical from db to db. The table holds all the selections you make when working through the wizard. If both exist, the wizard opens filled with the data from the [Switchboard Items] table which you can then add to or modify. No change is ever made to the form.
If when you open the wizard one exists but not the other, you'll have a problem. I am not going to figure out what problem you are going to have, I'll just tell you how to recover. If you have the form but not the table, delete the form. If you have the table but not the form, rename the table if you want to save its data. If you don't care, then you can just delete it. Now when you open the wizard it won't see either of its objects so it will create them both. At that point you can just close the wizard. Then go to the tables tab and delete the newly generated [Switchboard Items] table and rename your old table back to the correct name. Now when you reopen the switchboard manager, you will see your original selects in the switchboard manager.
It is possible to modify the switchboard form. I frequently modify its appearance. I also change the code used to close the application. Currently the wizard generates code that closes your database but doesn't close Access. This is annoying so I just change the code so it closes both.