[Reed]

Also, under the historical tab, on the left side near the bottom make sure "use random rookies from all eras" is unchecked. I think you want to make sure " automatically import historical rookies" is checked, if I understand what you are trying to do.
Also, when you first create a league there is an option to use random players from various years, make sure that is off, unless you want random rookies from various years.