The AlignActivityWithPrimaryInterval makes the appointments bigger but now they show as overlapping even when they do not overlap.  I am attaching two screenshots.. both are set to start at 8am with a 9 hour day, one with this set to true and another to false.  Neither is very acceptable for me as the appointments need to both be visible and indicate if there is an overlap.

The 'test' appointment on 07/07/2010 is 8 hours long but barely shows up in one version. Am I misunderstanding how the logicaldaydurationoffset and duration work?  Shouldn't the appointment almost fill the slot?
The 'testing2' appointment goes from noon to 3pm and just shows up as a line, and in the other version it shows as overlapping the next appointment even though the next one starts at 3pm.