Groups do introduce complexities into the system. The major problems arise due to the existence of more than one record representing an Object.
For example, if you are counting Objects using the Item Count field, and both the individual members and the group object use this field, a portfolio of 20 prints with an item count of 21 (including the portfolio itself), and each print separately recorded with an Item Count of one, will result in these 21 records counting as 40 Items.
It is up to you, as the user to decide where the Item Count for the portfolio should be entered. It could be in the group (as 20 Items) or in each member object record as one. It should not be entered in both.
Your institution should develop a policy with regard to this and should adhere to it consistently.
