running them separate terminates the initial assigned "session" and reverts to defaults with the second command.

That's part of what I meant when I was talking about calling DBConnect every time DBRun or DBDo gets called: This will establish a new connection to the database for every command you run, so that will certainly cause the session to be ended and a new one begun. Have you tried to see what happens when you connect only once at the beginning of the script and then run your commands separately?