The approach given here looks a little simpler—maybe it would work for you?
If you don't want to remember to type "quit" instead of "exit", and you're using bash, just add the following to your .bashrc or other shell startup script:
trap '/usr/bin/osascript -e "tell application \"terminal\" to quit"' 0
What's it do? When the shell receives signal 0 (zero), that is, told to exit, it will execute this command as the last thing it does. This allows your shell, etc, to exit gracefully, and asking Terminal.app to exit via applescript makes sure it does the same. In other words, type 'exit', and your shell exits, then Terminal quits, all cleanly and the way nature intended.
The full thread can be found here.
The window bounds are a list of coordinates {left, top, right, bottom}. You probably intended "400" to be the width, but it's the position of the right edge of the window and 400 is to the left of 1105, so you get a minimum width window. Change 400 to 1105 plus the desired width, e.g., 1505.
But before you pursue this further, Terminal has a better solution for this: Window Groups. If you set up a group of windows and save them as a Window Group, each time you open that group it will create windows with the same layout and appearance.
Window > Save Windows as Group…
You can even tell Terminal to open a selected window group at startup:
Terminal > Preferences > Startup > On startup, open: > Window group:
(As a shortcut, when creating a window group there's a checkbox for making it the startup group.)
To automatically run particular commands in those windows, you can create custom settings profiles and specify the command with
Terminal > Preferences > Settings > [profile] > Shell > Startup > Run command:
then create each window with the appropriate profile.
Going further, in Mac OS X Lion 10.7 you can have window groups automatically restore commands without creating custom profiles, by creating the terminals using
Shell > New Command
instead of running the command inside the terminal shell. When creating the window group, you can check "Restore all commands". (By default, it will restore a small set of "safe" commands, but you must explicitly tell it if you want it to re-run all commands when opening the group.)
Moreover, Lion Terminal supports Resume and will automatically restore all your windows each time you open Terminal. It will even restore "safe" commands for terminals created with New Command.
Best Answer
You have "Close windows when quitting an app" checked on the machine that does not restore the terminal windows (your second machine).
This setting is in System Preferences -> General not in your Terminal preferences.
Uncheck this box to get the desired behavior. Understand however that this behavior can extend to other applications as well - it is not restricted to Terminal.app
As for the scroll bars, I suspect you will find that the Show Scroll Bars radio button in System Preferences -> General is not set the same on your two machines.