I have a few lists. One is a textbook that I take a chapter at a time. The other lists are random words I'd like to learn that happen at haphazard times that I want to learn right away. Right now, as I understand it, you can set the option in your study settings to either always continue adding once a section is complete, or always stop when a section is complete.
It would be a nice option to be able to set individual lists to stop adding after the current section finishes, and set the other lists to continuously add. But of course, this is a small thing. I think it may make more sense in the UI if it is possible.