Yeah, I don't get that either. Also, both of our four game away series this year are against the AL Central - Chi and Clev. While both 4 game home series are against the West - Hou and Tex.
If you remember the old rotations for Interleague were weird. We went how many years before we played the Dodgers there and I think 19 years before we played Milwaukee here again? Teams would be skipped for these rotations but then look at 2007, it made little sense. Arizona twice, and skipped Los Angeles and San Francisco.