The game should be importing the following schedule from your schedule file:
major_league_ml_c_2005.lsdl
Don't worry about the lsdl part. It's just a fancy pants term for the fancy pants file that is used as your schedule. Example below, with apologies in advance for my horrible Paint "skills". Everything is the same, except the year in my example is 1904, the auto adjust schedule if xml file is found box should be checked, there are 162 games instead of 154, the use balanced schedule box should be unchecked (unbalanced schedule), and the interleague play box should be checked. Also, there will obviously be two more playoff rounds than 1904 had. If it's still not working, jump from the options page (the one that this wonderful piece of art comes from) to the functions page in your game setup and click on edit league schedule. It takes you to a page with a bar in the bottom right corner labelled "Schedule...", just above the "Finish Today" bar. Click on it. A menu will pop up. Click on "Import from File" on that menu. Make sure that the screen that pops up is in your schedules folder. If it's not, manoeuver your way into the schedules folder and scroll down until you reach the exact schedule I showed you above. Click on it and click OK to re-import the 2005 schedule. If that ain't right, I suppose we could sacrifice a live chicken and see if that works.