It's come to my attention that some of you may not be setting lines properly. Note that yes the sim will use the last lines you have BUT you need to make sure you copy your lines to all the other 10 games available in the client program. If you set the lines for Day 1 only, Day 2-10 will remain unset and the sim will auto roster/auto lines you those games.
If you want your lines to stick for a while, make sure to hit that "Copy lines to all other days" button.