I often need to share baptism and confirmation ordinances with my grandchildren. I select B & C but my grandchildren receive ALL ordinances which they don't need and can't do.
Please make it possible for us to share just certain ordinances.
The best solution for this is to print the B & C card for them, do it as a pdf and email it. Then you retain the reservation and they do not have to share it back.
If you share the ordinances with the temple then unshare only the baptism and confirmation, you can share just the baptism and confirmation with them.
Use the Family Groups. You can share only the ordinances you want to. You can invite all your grandchildren to a Family Group and they can pick family names whenever they are ready for a temple trip. Even if they only use the Ordinance Ready tool, It will search in any Family Groups they are member of to see if there is ordinance work there that they can do.