Bad news, I'm afraid. The 396T scanner doesn't do multiple sites on a trunked radio system.
To receive that system properly, you'll have to create each site as its own system. It's a pain, but it is what it is.
In theory, you could program all of the control channels for all of the sites. The problem with that is the scanner will stop on the first active control channel it hears and discard the others. That means your scanner will only receive one site, though you may be in reception range of several.