Here is the response from Lionel:
Edward,
If you send the SC-2 to us we can fix it so that you can use 6 switches. Otherwise the manual is correct because port 1 cannot be used for switches.
Thank You,
Angela S
Lionel Customer Service
6000 Victory Lane | Concord, NC 28027
586-949-4100 ext 2 (o) | (704)-455-8940 (f)
By the manual being correct I assume they mean the O-90 switch manual, because that is not what is in the SC-2 manual, and it sure is not what is shown in the Mike R. video.
Ed