Hi Vince,
Include condition, and hide condition are different things. Fields not INLUDED are not on the form at all. From a code perspective they do not exist. They cannot be made to appear dynamically since they are not there.
Hidden fields also do not exist, but a stub exists for them, so they can be made to exists. When hidden they are removed from the form, so when the save is done they are not included I the post.
For question 2 i need more information in order to duplicate. Preferably an example.
Cheers
Bruce