Migration from 2.x to 3.2

We have successfully loaded, without errors, the dumpfile-to-rt-3.0 into
Mysql 5.0 from Mysql 3.2. When I look at the database schema after the
dump I noticed that there are changes to the tables and columns, for
example, table Watchers does not exist and new table Principals was
created. Is this normal behavior in RT 3.x. We need to make sure that
new database is valid before we test the RT.