It would be good to keep a record of all the joint members, when they joined the membership (if different date from the main member) and when they stopped being members (again, if different from the main member). For example, if someone joins as an individual member in 2020, and then in 2023 this person adds 2 people and upgrades to a family membership, it would be good to be able to see that the 2 extra members joined in 2023. At the moment it looks like they also joined in 2020. And viceversa, if a family membership downgrades to individual membership, and we take off the family members from the membership info, it will look like those family members were never members, so I can query for example how many members we had in total in 2023, because they wouldn't be in the list!