Hi Simon,
How are the components structured in the assembly? The parts list reflects the top level of components for the selection you're creating the drawing for, so in this case (Design contains 4 boxes, each is a component):

If you create a drawing of the entire design you will get a parts list with 4 line items (and component Properties):
But if I create a drawing of the whole design for this case (4 boxes are sub-components under a Component):

I will get a single line item in the parts list and no properties since the Component actually contains multiple sub-components:

From your description it sounds like this may be the reason.
In this case (nested sub-components) you will get all of the sub-components and properties listed in the parts list if you create the drawing from the top component node in the browser, not the whole design.
If you can send me or share your design with me (christopher dot miller @ autodesk dot com) I can take a look and see if we're looking at expected behavior or a bug. I am guessing though it's the structure of the components in the design that's leading to what you're seeing.
In the next Update we are enhancing view creation to allow views of different selections to be placed in the same drawing. Parts lists for each of these views will reflect the view you select. We are also adding the ability to insert an image into the existing titleblock, but for now this will be on a per-drawing basis. Work is underway for custom titleblock creation/editing which will persist for new drawings (customizations will be saved in the drawing template) but this is still in progress (another update or 2?).
Thanks,
Chris