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them by years, by family, by major event photographed, etc. etc.
Why not label them as such? I think you are somewhat over-zealous in your folder creation routine, but folders usually sort by numbers first, then alphabetically (at least for now, no telling when Apple "management" may decide to change that!).
Besides, isn't the majority of the date stuff already in the meta data? Can't iPhoto sort on that?
So...
Folder 1: 2001
Folder 2: 2003
etc.
In folder 2001:
January
In January:
Events
Family
Weird Ones
Don't let anyone see these!
And so on. Surely iPhoto has a way to find folders? If not, try making even more with the Smart Folder method, which is probably what you're already doing:
Events folder
By Date
By Family
Inside the Date one use the following date format:
2001_01
2001_02
etc.
Inside Family:
Peairs_Kids
Peairs_R
Smith
Williams
etc.
And, then there are Faces, events, places. With only 400+ images, it shouldn't take more than a few weeks for iPhoto to be able to recognize 50% of the people, the rest will be automagic. Places will take only a few months to reach the majority. Events may be for your ancestors! 
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Why it wasn't working since I began thiniking about this a couple of months ago, and now it is . . .???
You're old enough now, that the computer respects you?