[Zope] Batch processing

Hi! I've just noticed something strange? here while trying to do some stuff using batch processing. I followed the example in the dtml users guide (rev 1.6 s. 27) only changed the size of the batches to '1' rather than '5'. Now - I tought that would let me step back and forth trough the list in steps of '1', and it does till theres 3 items left in the list - then all three is displayed at once (wich is not what I want). Is this a bug, or am I doing something stupid here, what? Thanks Sture Lygren