Why do you care about the issue of Community Property or Joint Tenancy, when you already told us this: "this is for a couple who bought a home in jt. tenancy and are preparing a living trust."

If the property is going into the Trust, then the other stuff doesn't apply.

A lot of people either don't need a Trust, or never bother to populate the Trust with the property the Trust would be protecting.

You can't have it both ways.