Okay, so I think I've figured out the summoning points. You get so many points per level, and I assume you get more points for focusing in conjuration magic.
So at fourth level, with no focus I have 40 points. Controlling one or more Summon I's not a problem. My Summon II costs 60 points. More points than I have. No control.
Is this a feature or a bug in my summoning theme?
It doesn't seem right that at levels 3 and 4 I can't control at least one Summon II without school focus.
It is not deliberate, the system is going to be changed once Johannes (http://www.escapefromunderdark.com/forums/showthread.php?t=20978) returns.
Howland didn't realize he's linking to a private thread. FYI, Johannes is temporarily out due to computer failure.