You are right - that does appear "too small". Did you remember to launch the Skyrim Launcher as part of the "Configure Skyrim" section at the top of the SRLE guide?
If you did forget, I am unsure if doing it now with fix the ini files in your MO Profile. You may wish to investigate spINI. Download and run it _OUTSIDE OF MO_, and it should detect your MO profile, which you can select under the "INI Path" option on the setup tab.
Then, on the basic tab, "Defaults" -> "Ultra" -> "Save and Exit" should get your ini files back to a reasonable state to add the SRLE recommended tweaks.
