workbench modeling schemas

[Pete Watters]

In a Modeling tab you can have more than one schema

as a test I created 2 schemas hand created tables for each

when I forwared engineered the model all the tables from both schemas had tables creaded into a single schema/database

So

Under what circumstances would I want more than one schema in the model and
what purpose would multiple schemas have

Or did my testing have some flaw

Just trying to understand, thanks